Q. For a system to work, as oscillator the total phase shift of the loop gain must be equal to

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Q. An amplifier has a large ac input signal. The clipping occurs on both the peaks. The output voltage will be nearly a

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Q. To prevent a DC return between source and load, it is necessary to use

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Q. For a base current of 10 μA, what is the value of collector current in common emitter if βdc = 100

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Q. Which of the following oscillators is suitable for frequencies in the range of mega hertz?

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Q. Consider the following statements : A clamper circuit

1. adds or subtracts a dc voltage to a waveform
2. does not change the waveform
3. amplifiers the waveform

Which are correct?

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Q. A forward voltage of 9 V is applied to a diode in series with a 1 kΩ load resistor. The voltage across load resistor is zero. It indicates that

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Q. Which power amplifier can deliver maximum load power?

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Q. The quiescent collector current IC, and collector to emitter voltage VCE in a CE connection are the values when

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Q. An exponential amplifier has diode in feedback path.

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Q. DC amplifiers have a tendency to be unstable.

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Q. A half wave diode rectifier has a capacitance input filter. If input voltage is Vm sin ωt, PIV is

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Q. An amplifier with loop gain Aβ will be more stable for value of Aβ as

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Q. A CB amplifier has re = 6 Ω, RL = 600 Ω and a = 0.98. The voltage gain is

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Q. A bridge rectifier circuit has input of 50 Hz frequency. The load resistance is RL and filter capacitance is C. For good output wave shape, the time constant RLC should be at least equal to

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Q. In class C operation of an amplifier circuit, the collector current exists for

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Q. In a BJT circuit a pnp transistor is replaced by npn transistor. To analyse the new circuit

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Q. To protect the diodes in a rectifier and capacitor input filter circuit it is necessary to use

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Q. Maximum efficiency of class B power amplifier is 50%.

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Q. The self bias provides

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