Electronics and Communication Engineering - Analog Electronics

1. 

In a transistor amplifier, the reverse saturation current ICO

A. Doubles for every 10°C rise in temperature
B. Doubles for every 20°C rise in temperature
C. Increase 100°C with temperature
D. Doubles for every 5°C rise in temperature

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

2. 

When the emitter current of a transistor is changed by 1 mA, its collector current changes by 0.990 mA. The common-emitter short-circuit current gain is

A. 1
B. 199
C. 99
D. 9.9

Answer: Option C

Explanation:

No answer description available for this question. Let us discuss.

3. 

In figure Vi may vary from 15 to 20 V and load current may vary from 20 mA to 100 mA. Suitable maximum value of R is

A. 20 Ω
B. 50 Ω
C. 100 Ω
D. 200 Ω

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.

4. 

Assertion (A): A common collector amplifier is used for matching a high impedance source to a low impedance load

Reason (R): A common collector amplifier has a near unity voltage gain

A. Both A and R are correct and R is correct explanation for A
B. Both A and R are correct but R is not correct explanation for A
C. A is correct R is wrong
D. A is wrong R is correct

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.

5. 

In a crystal oscillator of the Colpitt's oscillator type, the crystal is put is place of the

A. resistor R1
B. condenser C2
C. condenser C1
D. inductor L

Answer: Option D

Explanation:

No answer description available for this question. Let us discuss.

1 2 3 4 5 6 7 8 9 10 Next »