Q. Power transistors are invariably provided with

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Q. Assertion (A): The ac load line is different from dc load line

Reason (R): The ac load resistance seen by collector and emitter is different from dc load resistance

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Q. In a class C operation VCC = 40 V and VCE(sat) = 0.4 V. The efficiency is

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Q. The absolute values of pinch-off voltage and gate-source cut-off voltage are

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Q. Which of the following circuit does not need a coupling capacitor?

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Q. Assertion (A): A large negative feedback is deliberately introduced in an amplifier to make its gain independent of variation is in parameters of active device and other components.

Reason (R): A large negative feedback results in a high value of return difference compared to unity which makes the feedback gain inversely proportional to feedback factor.

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Q. In case of a transistor amplifier the emitter resistance Re is removed

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Q. In oscillators class C operation is preferred because

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Q. In a common emitter circuit all voltages are measured with respect to

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Q. The h parameter equivalent to ac resistance re is

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Q. The theoretical maximum efficiency of a half wave diode rectifier is

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Q. Which of the following statement is correct?

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Q. In a transistor push pull amplifier

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Q. In a self bias circuit for CE amplifier, the base voltage is

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Q. A push pull amplifier is a

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Q. An engineer designs an amplifier to have a voltage gain of 60, but when constructed it only had a gain of 50. How much feedback should be used to provide the desired level?

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Q. Which of the following oscillator circuits uses three capacitors in the phase shifting network?

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Q. Consider the following rectifier circuits :

1. half-wave rectifier without filter
2. full-wave rectifier without filter
3. full-wave rectifier with series inductance filter
4. full-wave rectifier with capacitance filter.

The sequence of these rectifier circuits in decreasing order of their ripple factor is

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Q. When a transistor is to be at a temperature above 25°C

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Q. Assertion (A): In monolithic IC the components are part of one chip

Reason (R): An op-amp is a high gain dc amplifier

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