AP ECET EEE 2017-8

1. As compared to a closed loop system, an open loop system is

A. More stable as well as more accurate
B. Less stable as well as less accurate
C. More stable but less accurate
D. Less stable but more accurate

Answer : More stable but less accurate
Explain:-

2. A fuse is

A. Always connected in series with the circuit
B. Always connected in parallel with the circuit
C. Normally connected in series with the circuit
D. Normally connected in parallel with the circuit

Answer : Always connected in series with the circuit
Explain:-

3. As per recommendation of IS the maximum load that can be connected in one sub circuit is

A. 800 Watts
B. 1000 Watts
C. 1600 Watts
D. 500 Watts

Answer : 800 Watts
Explain:-

4. Lamps in street lighting are all connected in

A. Series
B. Parallel
C. Series-parallel
D. end-to-end

Answer : Parallel
Explain:-

5. The resistance of earth should be

A. Infinite
B. High
C. Low
D. The minimum posible

Answer : The minimum posible
Explain:-

6. A source follower using an FET usually has a voltage gain which is

A. Greater than 100
B. Slightly less than unity but positive
C. Exactly unity but negative
D. About -10

Answer : Slightly less than unity but positive
Explain:-

7. Dark current in a semiconductor photodiode is

A. The forward bias current
B. The forward saturation current
C. The reverse saturation current
D. The transient current

Answer : The reverse saturation current
Explain:-

8. In a centre tap full wave rectifier, 100 V is the peak voltage between the centre tap and one end of the secondary. What is the maximum voltage across the reverse biased diode

A. 200 V
B. 141 V
C. 100 V
D. 86 V

Answer : 200 V
Explain:-

9. In an inverting amplifier, the two input terminals of an ideal op-amp are the same potential because

A. The two input terminals are directly shorted internally
B. The input impedance of the op-amp is infinity
C. Common Mode Rejection Ratio is infinity
D. The open loop gain of the op-amp is infinity

Answer : The open loop gain of the op-amp is infinity
Explain:-

10. If the differential and common mode gain of a differential amplifier are 50 and 0.2 respectively, then the Common Mode Rejection Ratio will be

A. 10
B. 49.8
C. 50.2
D. 250

Answer : 250
Explain:-