| 1. | A transistor has a current gain of 0.99 in the CB mode. Its current gain in the CC mode is ? | |
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0.99
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1.01
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99
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100
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Report Question| 2. | At 25°C, the collector-emitter voltage drop of a silicon transistor at saturation is approximately ? | |
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0.1 V
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0.7 V
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0.3 V
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0.5 V
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| 3. | While using a bipolar junction transistor as an amplifier, the collector and emitter terminals got interchanged mistakenly. Assuming that the amplifier is a common emitter amplifier and the biasing is suitably adjusted, the interchange of terminals will result into which one of the following ? | |
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Reduced gain
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Zero gain
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Infinite gain
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No change in gain at all
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| 4. | When the positive voltage on the gate of a p-channel JPET is increased, its drain current ? | |
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increases
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remains the same
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decreases
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none of the above
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| 5. | Which one of the following statements is correct for MOSFET ? | |
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N channel MOS must have twice the area of P channel MOS for the same ON resistance
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P channel MOS is easier to produce than P channel MOS
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channel MOS has higher packing density than a channel MOS
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P channel MOS has faster switching action than N channel MOS
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| 6. | The lower tum off time of MOSFET when compared to BJT can be attributed to which one of the following ? | |
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Absence of minority carriers
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On-state resistance
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Positive temperature coefficient
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Input impedance
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| 7. | A gate to drain-connected enhancement mode MOSFET is an example of ? | |
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a three-terminal device
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a diode
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an active load
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a switching device
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| 8. | The threshold voltage of an channel MOSFET can be increased by ? | |
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reducing the channel length
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reducing the gate-oxide thickness
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increasing the channel dopant concentration
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reducing the channel dopant concentration
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| 9. | For an npn bipolar transistor, what is the main stream of current in the base region ? | |
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Drift of electrons
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Diffusion of electrons
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Drift of holes
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Diffusion of holes
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| 10. | In a transistor amplifier, the reverse saturation current Ico ? | |
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doubles for every 1"C rise in temperature
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doubles for every 10°C rise in temperature
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doubles for every 5°C rise in temperature
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increases linearly with temperature
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