ECET EEE 2009-1

1.An UJT Exhibits negative resistance region

A. between peak point and valley point
B. before the peak point
C. aftervalley points
D. Never

Answer : aftervalley points
Explanation:-

2.A karnaugh map with 4 variable has

A. 16 cells
B. 2 cells
C. 8 cells
D. 4 cells

Answer : 16 cells
Explanation:-

3.In a four variable K-map,eight adjacent cells give a

A. Three variable term
B. Two variable term
C. Four variable term
D. single variable term

Answer : Two variable term
Explanation:-

4. The Number of digits in hexadecimal is

A. 16
B. 8
C. 10
D. 15

Answer : 16
Explanation:-

5. An asymmetrical SCR(ASCR) has forward voltage rating in the range of

A. 100-200v
B. 500-2000v
C. 5000-10000v
D. 20-30v

Answer : 500-2000v
Explanation:-

6.For a wide range of oscillations in the audio range the preferred oscillator is

A. Hartley
B. Phase shift
C. Hartley and colpitt
D. wein bridge

Answer : wein bridge
Explanation:-

7.A Single diode operate as a

A. full wave rectifier
B. half wave rectifier
C. bridge rectifier
D. Non Rectifier

Answer : half wave rectifier
Explanation:-

8. The phase shift ocsillator using

A. Transistor is a voltage series feedback
B. OP amplifier is voltage series feedback
C. op-amp is a voltage shunt
D. FET is a voltage shunt feedback

Answer : Transistor is a voltage series feedback
Explanation:-

9. Binary number (1101) is equal to octal number

A. 17
B. 15
C. 16
D. 14

Answer : 15
Explanation:- Given Binary 1101
001 101
1 5----(15)Octal

10.A Zener diode is used as

A. current regulator
B. voltage booster
C. voltage regulator
D. power regulator

Answer : voltage regulator
Explanation:-