Q. In a class C power amplifier the input signal has a frequency of 250 kHz. If the collector current pulses are 0.1 μs wide, the duty cycle of current waveform is

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Q. The dissipation at the collector is in the quiescent state and increases with excitation in the case of a

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Q. The open loop gain of an ideal op-amp is

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Q. The ideal characteristics of a stabilizer is

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Q. A difference amplifier using op-amp has closed loop gain = 50. If input is 2 V to each of inverting and non-inverting terminals, output is 5 mA. Then CMRR =

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Q. The coupling capacitor in amplifier circuits

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Q. An ideal op-amp has zero slew rate.

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Q. In a bridge rectifier circuit the rms value of input ac voltage is 10 V. The PIV across each diode is

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Q. In a half wave diode rectifier circuit the current flows in the load circuit for

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Q. In a push pull circuit

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Q. A transistor with a = 0.9 and ICBO = 10 μA is biased so that IBQ = 90 μA. Then IEQ will be

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Q. The ripple factor of a half wave rectifier is more than 2.

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Q. In a CE amplifier drives a low load resistance directly the result will be

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Q. For high frequencies a capacitor like

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Q. In an amplifier the voltage gain is the ratio of

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Q. A typical value of gm for a FET is about 25 μs.

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Q. A transistor has two p-n junctions. The batteries should be connected such that

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Q. The value of parameter re used in re transistor model

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Q. Assertion (A): In a full wave rectifier output the lowest ac component is at twice the input frequency

Reason (R): In a full wave rectifier, the output waveform consists of half sinusoids

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Q. An op-amp has zero gain for common mode inputs. Then CMRR =

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