Q. A virtual ground is a ground for

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Q. As compared to a full wave diode rectifier circuit using centre tapped transformer, the bridge diode rectifier circuit has the main advantage of

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Q. To bypass a 100 ohm emitter resistor at

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Q. In a CE amplifier the dc load line is the same as ac load line when

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Q. If the output current wave shape of class C circuit has a period of 1 μs and a pulse width of 0.006 μs, the duty cycle is

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Q. Which configuration is suitable for impedance matching?

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Q. A BJT is said to be operating in saturation region if

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Q. Which component is allowed to pass through it by a choke filter?

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Q. In an amplifier the stray capacitances assume impedance at low frequencies

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Q. In CE amplifier the base current is very high.

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Q. In the graphical analysis of CE amplifier circuit, the upper end of load line is called

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Q. A full wave rectifier supplies a load of 1 kΩ. The a.c. Voltage applied to the diodes is 220 - 0 - 220 Volts rms. If diode resistance is neglected, then Average d.c. Voltage

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Q. Consider 49 cascaded amplifiers having individual rise time as 2 n sec. 3 n sec. ... 50 n sec. The input waveform rise time is 1 n sec. Then the output signal rise time is given time by (Assume output signal rise time is measured within 10 percent range of the final output signal.)

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Q. In a capacitor filter, the time constant RLC should be small.

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Q. A 741 type op-amp has a gain bandwidth product of 1 MHz. A non-inverting amplifier using this op-amp and having a voltage gain of 20 dB will exhibit a -3dB bandwidth of

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Q. In a full wave rectifier circuit using centre tapped transformer, the peak voltage across half the secondary winding is 40 V. If diodes are ideal, the average output voltage is

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Q. In the graphical analysis of an amplifier circuit, the slope of dc load line depends on

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Q. In a self bias circuit for CE amplifier, an increase in emitter resistance RE results in

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Q. For a BJT if β = 50, ICEO = 3 μA and IC = 1.2 mA then IE

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Q. When the circuit is switched on, the loop gain of a Wien bridge oscillator is

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