Q. Assertion (A): An ac amplifier uses coupling capacitors at input and output

Reason (R): The capacitive reactance varies inversely with frequency. It is infinite for dc

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Q. Common base configuration is little used because

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Q. If the plate supply voltage for a plate modulated class C amplifier is E volts, the maximum plate-cathode voltage could be almost as high as

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Q. The changes in ambient temperature affect the open loop gain of amplifier.

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Q. In a JFET, the lower end is called the __________ and the upper end is called the __________ .

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Q. A semi-conductor device that behaves like two SCRs is

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Q. As compared to a BJT amplifier circuit, a JFET amplifier circuit

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Q. In an oscillator the total phase shift around the loop must be

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Q. The enhancement type MOSFET is called a

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Q. The input gate current of a FET is

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Q. For maximum unclipped output from a CE amplifier, the Q point should be

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Q. Which of the following best represents the input impedance of an actual op-amp?

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Q. If three cascaded stages of amplifier have gains 10, 20 and 30 the overall voltage will be

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Q. A collector collects

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Q. In a resistance loaded, RC coupled amplifier the d.c. component is blocked by

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Q. A logarithmic amplifier has diode in the feedback path.

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Q. The input resistance of FET in the low frequency small signal operation is

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Q. Which of the following parameters of CE circuit has the unit of ohms?

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Q. Whenever a JFET operates above pinch-off voltage

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Q. A Weinbridge oscillator is a

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