TS ECET EEE 2019

1. Hard magnetic materials are categorized by _____

A. high residual magnetism and low coercive force
B. high residual magnetism and high coercive force
C. low residual magnetism and low coercive force
D. low residual magnetism and high coercive force

Answer : B. high residual magnetism and high coercive force
Explanation:-

2. In dielectric materials, the dielectric loss angle will be ________

A. very small
B. medium
C. large
D. exactly 90deg

Answer : A. very small
Explanation:-

3. The suitable material used for heating elements and loading rheostats is ________

A. tungsten
B. nichrome
C. carbon
D. brass

Answer : B. nichrome
Explanation:-

4. A battery is charged at a potential of 15 volts for 8 hrs when the current is 10A. The battery on discharge supplies a current of 5A for 15hrs. The mean terminal voltage during discharge is 14 volts. The watt-hour efficiency of the battery is ________

A. 82.5%
B. 80%
C. 90%
D. 87.5%

Answer :D. 87.5%
Explanation:-

5. If v,w and q for voltage, energy, and unit positive charge respectively, then v can be expressed as ______

A. v=dq/dw
B. dv=dq/dw
C. v=dw/dq
D. v=dw.dq

Answer : C. v=dw/dq
Explanation:-

6. Two straight parallel conductors are kept horizontally on eabove the other. If the upper wire suspends in air without any support, then the direction of flow of current in the wires should be _______

A. in same direction
B. in opposite direction
C. clock wise direction
D. anti clock wise direction

Answer : B. in opposite direction
Explanation:-

7. Which of the following statements is not correct

A. ohms law is applicable for ohmic conductors only
B. KCL is derived from the law of conservation of charge
C. superposition theorem is applicable to calculate the power in a circuit
D. Thevenins voltage is an open circuit voltage across the load terminals

Answer : C. superposition theorem is applicable to calculate the power in a circuit
Explanation:-

8. same mass of copper is drawn into 2 wires of 1mm thick and 3mm thick. Two wires are connected in series and current is passed. Heat produced in the wires is in the ratio of ______

A. 3:1
B. 9:1
C. 81:1
D. 1:81

Answer : C. 81:1
Explanation:-

9. A current of i=300t is suddenly applied to an inductance of 1mH. Find the induced voltage?

A. 0.3V
B. 3v
C. 30v
D. 300v

Answer : A. 0.3V
Explanation:-

10. An ideal voltage source of 10V, an ideal current source of 1A and a pure resistance of 5ohms are connected in parallel. Find the current flowing through 5ohms resistance?

A. 1A
B. 2A
C. 3A
D. 4A

Answer : B. 2A
Explanation:-

11. The resistance of a copper wire is R ohms. The wire is streched to its double length. The new resistance is _______ ohm

A. R
B. R/2
C. 4R
D. 2R

Answer : C. 4R
Explanation:-

12. The number of 2micro F, 400V capacitors needed to obtain a capacitance value of 1.5micro F rated for 1600V

A. 12
B. 8
C. 6
D. 4

Answer : A. 12
Explanation:-

13. The armature resistance of a 6 pole lap wound dc machine is 0.05 ohm. If the armature is rewound using a wave winding, then the armature resistance will be ______

A. 0.45 ohm
B. 0.3 ohm
C. 0.15 ohm
D. 0.1 ohm

Answer : A. 0.45 ohm
Explanation:-

14. If the speed of a dc motor increases with load torque, then it is a

A. series motor
B. permanent magnet motor
C. differentially compound motor
D. cumulatively compound motor

Answer : C. differentially compound motor
Explanation:-

15. A dc series motor is driving a load whose torque varies a square of the speed. When the speed is 250 rpm, the line current is 15A. If the speed is 500rpm, then the line current is likely to be

A. 15A
B. 21.2A
C. 30A
D. 60A

Answer : C. 30A
Explanation:-

16. The terminal voltage of a DC series generator is 150V when the load current is 5A. Taake the combined resistance of armature and series field as 1ohm. If the load current is increased to 10A for the same generated emf the terminal voltage will be _______

A. 145 V
B. 155 V
C. 150 V
D. 210 V

Answer : A. 145 V
Explanation:-

17. Two DC machines are tested by hopkinson test. The rating of each machine is 250Kw. The power input during this test would be around_____

A. 250kw
B. 375kw
C. 500kw
D. 50kw

Answer : D. 50kw
Explanation:-

18. The interpole mmf is proportional to _____

A. armature current
B. field current
C. product of armature current and field current
D. ratio of armature current to field current

Answer :A. armature current
Explanation:-

19. The number of parallel paths in the armature winding of a four pole, wave connected DC machine 22 coil side is ________

A. 4
B. 2
C. 22
D. 1

Answer :B. 2
Explanation:-

20. To have sparkless commutation, the armature reaction effect in a DC machine is neutralised by _______

A. using compensating winding and commutationg poles
B. shifting brush axis from the geometrical neutral axis to the magnetic neutral axis
C. fixing the brush axis in alignment with the main pole axis
D. increasing the field excitation

Answer : B. shifting brush axis from the geometrical neutral axis to the magnetic neutral axis
Explanation:-

21. A single phase energy meter is operation on 230v, 50Hz supply with a load of 20A for 2hrs at unity power factor. The meter makes 1380 revolutions in that period. The meter constant is ________

A. 695 rev/kwh
B. 150rev/kwh
C. 1000rev/kwh
D. 1/150 rev/kwh

Answer : B. 150rev/kwh
Explanation:-

22. A moving coil instrument gives full scale deflection for 1mA and has a resistance of 5ohms. If a resistance of 0.55ohms is connected in parallel to the instrument what is the maximum value of current it can measure?

A. 100mA
B. 50mA
C. 10 mA
D. 5 mA

Answer : C. 10 mA
Explanation:-

23. Which of the following types of instruments can be used to determine the rms value of AC voltage of high magnitude(10kv) and of any wave shape?

A. moving iron instruments
B. dynamometer type instruments
C. induction instruments
D. electrostatic instruments

Answer :D. electrostatic instruments
Explanation:-

24. Which of the following materials is used in the fabrication of swamping resistance of a PMMC instrument?

A. copper
B. aluminium
C. manganin
D. tungsten

Answer : C. manganin
Explanation:-

25. Permenent magnet moving coil ammeters have uniform scales because ______

A. of eddy current damping only
B. they are spring controlled only
C. their deflecting torque varies directly as current varies
D. they are spring controlled and deflecting torque varies directly as current varies

Answer : D. they are spring controlled and deflecting torque varies directly as current varies
Explanation:-

26. The most efficient form of damping employed in electrical instruments is _______

A. air friction
B. fluid friction
C. eddy current
D. over damping

Answer : C. eddy current
Explanation:-

27. An AC series circuit consisting of a resistance of 6ohms and an inductive reactance of 8 ohms is connected to a single phase 200V, 50Hz AC supply. The current flowing inthe circuit would be _______

A. 14.3 A
B. 10 A
C. 20 A
D. 25 A

Answer :C. 20 A
Explanation:-

28. The voltage and current in a circuit are given by
v = 10 sin(wt-π/6)
i = 10 sin(wt+π/6)
The power consumed is given as ______

A. 100W
B. 50W
C. 86.6W
D. 25W

Answer : D. 25W
Explanation:-

29. In a circuit, the volatge and current are given as (10+j5) volts and (6+j4) amps respectively. The reactive power in the circuit is

A. 70 VAR
B. 60 VAR
C. 10 VAR
D. -10 VAR

Answer :D. -10 VAR
Explanation:-

30. When two watt meter method of measurement of power is used to measure power in a balanced three phase circuit, if one of the wattmeter readings is zero, then

A. power consumed in the circuit is zero
B. power factor of the circuit is zero
C. power factor is unity
D. power factor is 0.5

Answer : D. power factor is 0.5
Explanation:-

31. A coil having a resistnace of 5 ohms and inductance of 0.1 H connected in series with a capacitor of 50µF. A constant alternating voltage of 200 V is applied to the circuit. The voltage across the coil at resonance is ______

A. 200 V
B. 1788 V
C. 1800 V
D. 2000 V

Answer : C. 1800 V
Explanation:-

32. Two impedances are connected in series. Across each impedance a voltmeter is connected and another voltmeter is connecetd the combination of two impedances. The phase angle between the voltages across the two impedances when all the three voltmeters read equal value _______

A. 30°
B. 60°
C. 90°
D. 120°

Answer : D. 120°
Explanation:-

33. A 200/400 V ratio, single phase transformer has a secondary winding resistance of 0.5 ohm. The primary resistance is 0.1 ohm. The total resistance is reffered to primary should be

A. 0.225 ohm
B. 0.50 ohm
C. 1 ohm
D. 2 ohm

Answer : A. 0.225 ohm
Explanation:-

34. The regulation of two winding transformer is 5% at full load unity power factor At full load 0.8 pf lagging the regualtion would be

A. 5%
B. less than 5%
C. more than 5%
D. 0%

Answer : C. more than 5%
Explanation:-

35. A 10KVA 100/300 V two winding transformer is used as an auto transformer by connecting the two windings in series to supply a 300V load from a 400V AC supply. The maximum KVA which can be supplied by an auto transformer is ______

A. 10 KVA
B. less than 10 KVA
C. 40 KVA
D. 100 KVA

Answer :C. 40 KVA
Explanation:-

36. A three phase transformer is composed of three transformers connected in delt-delta. Its rating is 100KVA. If one of the units gets damaged and it is operated in open delta, then the rating will be ______

A. 100 KVA
B. 66.6 KVA
C. 57.7 KVA
D. 50 KVA

Answer : C. 57.7 KVA
Explanation:-

37. The ratio of the primary to secondary voltage of a transformer is 2:1. If an auto transformer is used instead of a two winding transformer, then the saving in terms of weights of a copper required will be _______

A. 50%
B. 33.33%
C. 66.67%
D. 97%

Answer :A. 50%
Explanation:-

38. A two winding transformer has iron losses and full load copper losses equal to W watts each. It is tested along wilth another similar transformer for back to back test. The total power inout would be _______

A. 4 W
B. 2 W
C. 1 W
D. 0.5 W

Answer : A. 4 W
Explanation:-

39. If the power factor of an alternator is zero lagging the armature reaction is ______

A. demagnetising
B. magnetising
C. cross magnetising
D. demagnetising as well as cross magnetising

Answer :A. demagnetising
Explanation:-

40. The reactive power output of a cylindrical rotor alternator is maximum when

A. δ = 90°
B. δ = 45°
C. δ = 0°
D. δ is slightly less than 90°

Answer : C. δ = 0°
Explanation:-

41. The full pitch coil in a synchronous machine has a span of 18 slots. To eliminate third harmonics, the coil span would be _____

A. 9 slots
B. 12 slots
C. 15 slots
D. 18 slots

Answer : B. 12 slots
Explanation:-

42. An under excited synchronous motor operates at _____

A. lagging power factor
B. unity power factor
C. leading power fcator
D. lagging power factor at low loads and leading power factor at high loads

Answer : A. lagging power factor
Explanation:-

43. Synchronous motors are used in situations where

A. the load is constant
B. the load is required to be driven at very large speeds
C. the load is to be driven at constant speed
D. the starting torque requirement of the load is very high

Answer : C. the load is to be driven at constant speed
Explanation:-

44. A 5 HP, 3phase ,400 V star connected squirrel cage induction motor meant to drive a milling machine. At starting the machine takes the current about ______

A. 40 A
B. 100 A
C. 150 A
D. 200 A

Answer : A. 40 A
Explanation:-

45. A 3phase induction motor has a starting torque of 200 Nm when switched on directly to supply, if an auto transformer with 50% tapping is used for starting. The starting torque would be ______

A. 400 Nm
B. 200 Nm
C. 100 Nm
D. 50 Nm

Answer : D. 50 Nm
Explanation:-

46. A 400V, 50Hz Three phase induction motor rotates at 1440 rpm on full load. The motor is wound for

A. 2-poles
B. 4-poles
C. 6-poles
D. 8-poles

Answer : B. 4-poles
Explanation:-

47. While starting a three phase induction motor, a star delta starter is used to _____

A. reduce the starting current
B. achieve higher starting torque
C. enable the motor to start in the right direction
D. be able to reverse the direction of the rotation of the rotor as and when necessary

Answer : A. reduce the starting current
Explanation:-

48. Torque developed by a three phase 400V induction motor is 100Nm. If the applied voltage is reduced by 200V, then the torque developed is

A. 50 Nm
B. 25 Nm
C. 200 Nm
D. 62.5 Nm

Answer : B. 25 Nm
Explanation:-

49. When a single phase supply is connected across a single phase winding, the nature of magnetic field produce is ______

A. pulsating in nature
B. rotating in nature
C. constant in magnitude but rotating at synchronous speed
D. constant in magnitude and direction

Answer :A. pulsating in nature
Explanation:-

50. A capacitor start capacitor run motor has two capacitors, then

A. both the capacitors are in the circuit during the starting and running
B. one of the capacitors is in the circuit during starting and the other is in the circuit during running
C. both the capacitors are in the circuit during starting and one of them is during running
D. one of the capacitors are in the circuit during starting and one of them is during running

Answer : C. both the capacitors are in the circuit during starting and one of them is during running
Explanation:-

51. In order to have a lower cost of power generation, ______

A. the load factor and diversity factor should be low
B. the load factor and diversity factor should be high
C. the load fcator and diversity factor should be medium
D. the load factor should be low and diversity factor should be high

Answer : B. the load factor and diversity factor should be high
Explanation:-

52. A station operates with load factor and plant capacity factor of 0.75 and with a maximum demand of 100MW. the reserve capacity is ______

A. 100 MW
B. 75 MW
C. 133.33 MW
D. 0 MW

Answer : D. 0 MW
Explanation:-

53. A hydro power plant supplied by a river with a discharge of 3000 m3/sec at a head of 30 meters, with a plant efficiency of 79% develops a power nearly ________

A. 697.5 MW
B. 345.2 MW
C. 823.7 MW
D. 423.12 MW

Answer : A. 697.5 MW
Explanation:-

54. An industrial consumer has a load of 1500 kw at 0.8 pf lag for 12 hrs and 1000kw at upf for 12 hrs during the day. The daily load factor is ______

A. 0.833
B. 0.666
C. 1.500
D. 0.800

Answer :A. 0.833
Explanation:-

55. The area under the daily load curve gives _______

A. rated power of a generating station
B. the energy generated per day
C. the power consumed per day
D. the power consumed per day

Answer : B. the energy generated per day
Explanation:-

56. The material used for the fuse must have _______

A. low melting point with low specific resistance
B. low melting point and high specific resistance
C. low melting point with any specific resistance
D. high melting point and low specific resistance

Answer : B. low melting point and high specific resistance
Explanation:-

57. Making capacity of circuit breaker is equal to

A. 2.55 times symmetrical breaking current
B. 1.50 times symmetrical breaking current
C. √2 times symmetrical breaking current
D. 100 times symmetrical breaking current

Answer :A. 2.55 times symmetrical breaking current
Explanation:-

58. In a thyrite lightning arrester, the resistance

A. varies linearly with the applied voltage
B. increases with the applied voltage
C. decreases linearly with the applied voltage
D. is high at low current and low at high current

Answer :D. is high at low current and low at high current
Explanation:-

59. The use of high speed breaker

A. reduces the short circuit current
B. improves system stability
C. decreases system stability
D. increases the short circuit current

Answer : B. improves system stability
Explanation:-

60. Which relay is more susceptible to electromagntic interface?

A. digital relay
B. electro mechanical relay
C. static relay
D. instantaneous induction cup relay

Answer : A. digital relay
Explanation:-

61. Distance relay is the best example of ______

A. unit protection scheme
B. non - unit protection scheme
C. independent protection scheme
D. differential protection scheme

Answer :B. non - unit protection scheme
Explanation:-

62. switching of unloaded transformer during zero crossing of voltage wave generators

A. maximum amount of magnetising inrush current
B. minimum amount of magnetising inrush current
C. zero amount of magnetising inrush current
D. large harmonics

Answer : A. maximum amount of magnetising inrush current
Explanation:-

63. The resistance and reactance of short transmission line are equal. At zero regulation, the load will be ______

A. unity power factor
B. zero power factor
C. 0.707 lag
D. 0.707 lead

Answer : D. 0.707 lead
Explanation:-

64. The presence of earth in case of overhead lines

A. increases the capacitance
B. increase the inductance
C. decreases the capacitance
D. decreases the inductance

Answer :A. increases the capacitance
Explanation:-

65. The sag for a span of 350m, if the ultimate tensile strength of conductor is 5000 kg, factor of safety is 2 and weight of conductor is 0.550 kg/m is nearly _______

A. 3.37 m
B. 6.20 m
C. 1.20 m
D. 10.8 m

Answer : A. 3.37 m
Explanation:-

66. A short line with a reactance of 20 ohms and negligible resistance operates with a sending end voltage of 132kv and receiving end voltage of 126 kv. The maximum power that can be transmitted with this voltage profile is about _______

A. 400 MW
B. 832 MW
C. 1000 MW
D. 132 MW

Answer : B. 832 MW
Explanation:-

67. A string of six insulators has self capacitances equal to 10times the pin-to-earth capacitance. The string efficiency will be around ___

A. 30%
B. 58.48 %
C. 40%
D. 55.55%

Answer : B. 58.48 %
Explanation:-

68. The propagation constant of a transmission line is ( 0.15x10^(-3) + j 1.5x10^(-3)). The wave length of the travelling wave is ______

A. (0.15x10^(-3))/(2π)
B. (2π)/(0.15x10^(-3))
C. (0.15x10^(-3))/π
D. π/(0.15x10^(-3))

Answer : B. (2π)/(0.15x10^(-3))
Explanation:-

69. The insulation resistance of a cable of length 10km is 1Mohm. For a length 100 km of the same cable, the insulation resistance will be ______

A. 1 Mohm
B. 10 Mohm
C. 0.1 Mohm
D. 0.01 Mohm

Answer :C. 0.1 Mohm
Explanation:-

70. In a three phase 4 wire AC system, if the loads are balanced, then current in the neutral wire is

A. 1 A
B. 2 A
C. 3 A
D. 0 A

Answer :D. 0 A
Explanation:-

71. For combined power and lighting load, the distribution system used is

A. 3 phase, 4wire
B. 1 phase, 2wire
C. 3 phase, 3wire
D. 2 phase, 2 wire

Answer : A. 3 phase, 4wire
Explanation:-

72. In an instrument transformer phase angle error occurs due to

A. secondary current not being 180° out of phase with the primary current
B. actual transformation ratio is different from turns ratio
C. secondary current is being 180° out of phase with primary current
D. secondary current is being in phase with primary current

Answer : A. secondary current not being 180° out of phase with the primary current
Explanation:-

73. A typical active load is

A. blower
B. lathe
C. pump
D. hoist

Answer : D. hoist
Explanation:-

74. which of the following statements is true?

A. in group drive initial cost is high
B. at no load dc series motor can be started safely
C. in case of centrifugal pumps, torque varies as the square of the speed
D. starting torque of a shaded pole motor is very high

Answer : C. in case of centrifugal pumps, torque varies as the square of the speed
Explanation:-

75. A locomotive with a mass of 50,000 Kg on a track whose coefficient of adhesion is 20% will produce a tractive effort of (around)

A. 25 KN
B. 1 KN
C. 100 KN
D. 250 KN

Answer :C. 100 KN
Explanation:-

76. Choose the correct statements from the following?

A. distance between stops divided by the actual time of run is called the scheduled speed
B. series parallel speed control is widely used in electric traction
C. meta-dyne converter output is constant current and constant voltage
D. battery electric drive is usually used for urban and sub urban series

Answer : B. series parallel speed control is widely used in electric traction
Explanation:-

77. The specific energy output of a traction motor is X watt hour per tonne-km and the efficiency of gear is 0.5 and the efficiency of motor is also 0.5. The value of specific energy consumption

A. 2X
B. X
C. 4X
D. 8X

Answer : C. 4X
Explanation:-

78. Which of the following is the characteristic of main line service in electric traction?

A. the operation involves over long distances within frequent stops
B. the operating speeds are low
C. accelerating and braking periods are relatively important
D. the distance between the stops is about 6 kms

Answer : A. the operation involves over long distances within frequent stops
Explanation:-

79. Electric braking through plugging without any additional corrective measure is possible for _____

A. 3 phase induction motor
B. 3 phase synchronous motor
C. dc series motor
D. repulsion

Answer : A. 3 phase induction motor
Explanation:-

80. An electric drive consists of

A. motor, transmitting shaft and control equipment
B. motor and load
C. motor, control equipment and load
D. motor, supply system and load

Answer : A. motor, transmitting shaft and control equipment
Explanation:-

81. Most commonly used AC motor is

A. synchronous motor
B. slip ring induction motor
C. squirrel cage induction motor
D. AC commutator motor

Answer : C. squirrel cage induction motor
Explanation:-

82. A 60W lamp gives a luminous flux of 1500 lumen, Its efficiency is ______

A. 1500 lumen/watt
B. 250 lumen/watt
C. 25 lumen/watt
D. 2.5 lumen/watt

Answer : C. 25 lumen/watt
Explanation:-

83. The size of continuous earth wire used with cables in domestic installation should not be less than _____ in any case

A. 8 SWG
B. 6 SWG
C. 12 SWG
D. 14 SWG

Answer : D. 14 SWG
Explanation:-

84. The minimum clearance above ground of the lowest conductor of an overhead line for high voltage lines upto 11Kv erected along a street is _____

A. 6.1 m
B. 5.2 m
C. 5.8 m
D. 4.0 m

Answer :C. 5.8 m
Explanation:-

85. The size of wire for wiring a 15A socket outlet in kitchen should be ______

A. 4 mm^2 aluminum conductor single core
B. 6 mm^2 aluminum conductor single core
C. 1.5 mm^2 aluminum conductor single core
D. 8 mm^2 aluminum conductor single core

Answer : A. 4 mm^2 aluminum conductor single core
Explanation:-

86. The load on each power sub circuit should be normally restricted to ______

A. 800 watts
B. 3000 watts
C. 2000 watts
D. 1000 watts

Answer : B. 3000 watts
Explanation:-

87. The main advantage of looping in system of wiring is

A. tappings are taken directly from the mains
B. no tappings are taken directly from the mains
C. joint boxes are used
D. the length of wire required is more

Answer : B. no tappings are taken directly from the mains
Explanation:-

88. In a CRO by changing the time base, the following can be changed?

A. amplitude of saw tooth voltage
B. frequency of saw tooth voltage waveform
C. gain of saw tooth voltage waveform
D. intensity of saw tooth voltage

Answer : B. frequency of saw tooth voltage waveform
Explanation:-

89. A monostable multivibrator is also called

A. a flip flop
B. a clock
C. one shot multivibrator
D. a free running multivibrator

Answer : C. one shot multivibrator
Explanation:-

90. The master slave JK flipflop is an example of _____

A. level trigerred device
B. positive edge triggered device
C. negative edge triggered device
D. pulse triggered device

Answer : D. pulse triggered device
Explanation:-

91. Two input XNOR gate gives HIGH output

A. when one input is HIGH and other is LOW
B. ONLY when both the inputs are the same
C. when both the inputs are the same
D. only when both the inputs are HIGH

Answer : C. when both the inputs are the same
Explanation:-

92. The conduction loss versus device current characteristic of a power MOSFET is best approximated by a/an

A. parabola
B. straight line
C. rectangualr hyperbola
D. experimentally decaying function

Answer : A. parabola
Explanation:-

93. A step-up chopper is used to feed a load of 400 V DC from a 250V dc, The induction current is continous if the off time of the switch in 20 micro sec. The switching frequency of the chopper in KHz is _____

A. 31.2 KHz
B. 50 KHz
C. 1 KHz
D. 314 KHz

Answer : A. 31.2 KHz
Explanation:-

94. The output voltage wave form of a three phase square wave inverter contains

A. only even harmonics
B. both odd and even harmonics
C. any odd harmonics
D. only triple harmonics

Answer : C. any odd harmonics
Explanation:-

95. Microcontroller 8051 has _____ bits of the data bus

A. 16
B. 8
C. 32
D. 64

Answer : B. 8
Explanation:-

96. A voltage dource 200 sin(314t) is applied to a thyristor controlled half wave rectifier with resistive load of 50 ohms. If the firing angle is 30deg with respect to supply voltage waveform, the average power in the load is _______

A. 90.6 W
B. 86.3 W
C. 60.8 W
D. 70.6 W

Answer : D. 70.6 W
Explanation:-

97. A single phase AC regulator with an inductive load has the following details: source voltage = 230V, frequency = 50Hz and wl = 5ohms. The control range of the firing angle(α) is

A. 0 ∠ α ∠ π
B. π/2 ≤ α ≤ π
C. 0 ∠ α ∠ π/2
D. π > α > π/2

Answer :B. π/2 ≤ α ≤ π
Explanation:-

98. When a bipolar junction transistor is operating in the saturation mode, which of the following statements is true about the slate of its collector-base (CB) and the base-emitter(BE) junction?

A. the CB junction is forward biased and the BE junction is reverse biased
B. both CB and E junctions are forward biased
C. the CB junction is reverse biased and the BE junction is forward biased
D. the CB junction is reverse biased and the BE junction is reverse biased

Answer : B. both CB and E junctions are forward biased
Explanation:-

99. The increasing order of speed of data access for the following device is
1. cache memory
2. CD ROM
3. Dynamic RAM
4. Processor Registers
5. Magnetic Tape

A. 5,2,3,4,1
B. 5,2,3,1,4
C. 2,1,3,4,5
D. 5,2,1,3,4

Answer : B. 5,2,3,1,4
Explanation:-

100. The octal equivalent of the HEX number AB.CD is _____

A. 253.314
B. 253.632
C. 526.314
D. 526.632

Answer : B. 253.632
Explanation:-