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Electronics and Communication Engineering - Analog Electronics

Exercise : Analog Electronics - Section 8
1.
In a transistor amplifier, the reverse saturation current ICO
Doubles for every 10°C rise in temperature
Doubles for every 20°C rise in temperature
Increase 100°C with temperature
Doubles for every 5°C rise in temperature
Answer: Option
Explanation:
No answer description is available. Let's 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
1
199
99
9.9
Answer: Option
Explanation:
No answer description is available. Let's 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
20 Ω
50 Ω
100 Ω
200 Ω
Answer: Option
Explanation:
No answer description is available. Let's 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

Both A and R are correct and R is correct explanation for A
Both A and R are correct but R is not correct explanation for A
A is correct R is wrong
A is wrong R is correct
Answer: Option
Explanation:
No answer description is available. Let's discuss.
5.
In a crystal oscillator of the Colpitt's oscillator type, the crystal is put is place of the
resistor R1
condenser C2
condenser C1
inductor L
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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