Exercise :: Analog Electronics - Section 3
- Analog Electronics - Section 1
- Analog Electronics - Section 2
- Analog Electronics - Section 3
- Analog Electronics - Section 4
- Analog Electronics - Section 5
- Analog Electronics - Section 6
- Analog Electronics - Section 7
- Analog Electronics - Section 8
- Analog Electronics - Section 9
- Analog Electronics - Section 10
- Analog Electronics - Section 11
- Analog Electronics - Section 12
- Analog Electronics - Section 13
- Analog Electronics - Section 14
- Analog Electronics - Section 15
- Analog Electronics - Section 16
- Analog Electronics - Section 17
- Analog Electronics - Section 18
- Analog Electronics - Section 19
- Analog Electronics - Section 20
- Analog Electronics - Section 21
| 1. | A full wave rectifier circuit using centre tapped transformer and a bridge rectifier are fed at 100 V, 50 Hz. The frequencies of outputs in these two rectifiers are |
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Answer: Option A Explanation: Output wave in each case has two cycles for one cycle of input wave. |
| 2. | When the ac base voltage in a CE amplifier circuit is too high, the ac emitter current is |
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Answer: Option D Explanation: A high signal causes distortion because v-i characteristics of BJT is non-linear. |
| 3. | When load is coupled to class A amplifier through transformer, efficiency decreases. |
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Answer: Option B Explanation: Transformer coupling increases efficiency. |
| 4. | The gain of an FET amplifier can be changed by changing |
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Answer: Option B Explanation: Gain is proportional to gm . |
| 5. | The open loop gain of an actual op-amp is about 100. |
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Answer: Option B Explanation: It is very high. |