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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Q. CMRR of an op-amp is about 0.1.

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Q. A transistor amplifier has poles at

s1 = - 0.000245 x 10⁹ rad/sec.
s2 = - 0.0748 x 10⁹ rad/sec.
s3 = - 0.670 x 10⁹ rad/sec.
s4 = - 4.38 x 10⁹ rad/sec.

The upper 3 dB frequency of the amplifier will be

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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. What value of feedback will double the gain?

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Q. The maximum theoretical efficiency for class A amplifier is

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Q. Assertion (A): A class C amplifier can also be used as frequency multiplier

Reason (R): When narrow current pulses drive a resonant circuit the output can be a near perfect sine wave

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Q. The parameter β of a BJT change by 300%. If self bias is used in the amplifier using this BJT, the quiescent value of IC and VCE remain almost the same.

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Q. A bypass capacitor produces

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Q. Rise time in a transistor is change from

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Q. In a JFET, gates are always

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