Q. Study the circuit of figure and examine the following statements:

1. It is an active low pass finer.
2. It is a second order filter.
3. The change in gain is 40 dB/decade.

Which of the above statements are correct?

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Q. In a circuit of figure, Vs = 10 cos(ωt) power drawn by the 2Ω resistor is 4 watts. The power factor is

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Q. In the op-amp circuit of figure, V0 =

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Q. Figure shows the self bias circuit for CE amplifier and its equivalent circuit. VBB and RB respectively are

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Q. Figure is a 24 Vr stabilized power supply. The zener is 24 V, 600 mW. The minimum zener current is 10 mA. Proper values R and maximum load current are

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Q. In figure as the load resistance is changed

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Q. In figure, voltage across R2 = + 10 V. If VBE = 0.7 V and VE = 0.7 V and RE = 10 kΩ, current through RE is

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Q. In figure, transistor βdc = 100 and LED voltage when it is conducting is 2 V. Then the base current which saturates the transistor is

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Q. In figure the dc emitter current of each transistor is about

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Q. Assume that op-amp in figure is ideal. If input Vi is triangular, the output V0 will be

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Q. In the diode circuit of figure the diodes are ideal. The average current through ammeter is

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Q. The critical frequency of the circuit of figure is

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Q. Find resistance RB to bring transistor to threshold of saturation VCB = 0, VBE = 0.7 V, a = 0.96

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Q. In figure ID = 4 mA. Then VGS =

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Q. In following circuit, RB will be if VCC = 10 V, VS = 2 V, RC = 5 kΩ, RS = 90 kΩ, β = 50, ICE = 0, VCEsat = 0.1 V

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Q. In following figure, what will be R1 and R2 for maximum symmetrical swing if VCSat ≈ 0. Given that RE = 200 Ω, RC = 400 Ω, VCC = 20 V, β = 99

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Q. Assertion (A): The circuit in figure produces repetitive narrow pulses when input is fed with sine or triangular waveform having peak value more than + V

Reason (R): The high gain op-amp produces voltages at two levels. If input is more than + V, the output is + 15 V otherwise the output is - 15 V.

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Q. For CE amplifier of figure, the slope of ac load line is

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Q. A non-inverting op-amp summer is shown in figure, the output voltage V0 is

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Q. In figure if C is replaced by short circuit then RB will be

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