Q. When the emitter current of a transistor is changed by 1 mA, its collector current changes by 0.990 mA. The common-emitter short-circuit current gain is

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Q. Assertion (A): A common collector amplifier is used for matching a high impedance source to a low impedance load

Reason (R): A common collector amplifier has a near unity voltage gain

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Q. In a crystal oscillator of the Colpitt's oscillator type, the crystal is put is place of the

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Q. Class A and Class B power amplifiers predominate at

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Q. In a class C operation VCC = 30 V and VCE(sat) = 2 V. The efficiency is

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Q. In a CE amplifier, the collector resistance is 6 kΩ and load resistance is 3 kΩ. The ac load resistance is

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Q. A voltage tripler circuit uses

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Q. An op-amp uses

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Q. In voltage amplifiers, the load resistance

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Q. The RC network of wein bridge oscillator consists of resistors and capacitors of values R = 220 kΩ and C = 250 PF Determine the frequency of oscillation

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Q. Which of the following statement is correct?

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Q. In a single stage differential amplifier, the output offset voltage is basically dependent on the mismatch of

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Q. Which of the following amplifier circuits has highest input impedance?

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Q. Which of the following device acts as an N-P-N and a P-N-P transistor connected base to base and emitter to controller?

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Q. A differentiating amplifier has capacitor in the input path.

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Q. Which of the following statement about TRIAC is incorrect?

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Q. A half wave diode rectifier and full wave diode bridge rectifier both have an input frequency of 50 Hz. The frequencies of outputs respectively are

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Q. Overall efficiency of class B amplifier is

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Q. For a transistor to have-a larger β it must have and a

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Q. JFET is also known as

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