Q. A certain transistor has αdc of 0.98 and a collectors leakage current of 5 μA. If IE = 1 mA, the collector current will be

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Q. If 1.5% of the output of an amplifier is feedback positively to the input, the minimum gain required of the amplifier for oscillations to occur, is

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Q. The use of a capacitor filter in a rectifier circuit gives satisfactory performance only when the load

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Q. Two 3Ω speakers in series will have a total impedance of

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Q. In a CE amplifier the ac signal is increased. Which of the following will not change?

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Q. The ideal op-amp has the following characteristics

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Q. The input differential stage of op-amp. 741 is baised at about 10 μA current such a low current of the input stage gives

1. high CMRR
2. high differential gain
3. low differential
4. high input impedance

Which of these are correct?

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Q. IN 3242 is a

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Q. Low frequency response of amplifier is mainly limited by

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Q. With negative feedback the closed loop gain is always less than open loop gain.

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Q. As compared to a bipolar transistor, a JFET is

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Q. In a bistable multivibrator, commutating capacitors are used to

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Q. Which of the following values represents the open loop gain of typical op-amp?

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Q. Which of the following configuration has low thermal stability?

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Q. Efficiency of class A power amplifier is very poor.

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Q. An ideal op-amp can amplify dc signals

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Q. Consider the following statements :The lower cut off frequencies of an RC coupled amplifier depend on

1. input and output coupling capacitor
2. emitter by pass capacitors
3. junction capacitances

Which of the above are correct?

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Q. Assertion (A): In a circuit using FET, gate is approximately at dc ground

Reason (R): Self bias stabilizes the quiescent operating point against changes in JFET parameters

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Q. The Darlington pair consists of the following two stages

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Q. A Clapp's oscillator is

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