Q. In a Hartley oscillator the condition for sustained oscillations is hfe = L₁/L₂ . If there exists mutual inductance M between coils L₁ and L₂, then the above condition will get modified as hfe

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Q. Figure shows current pulses of a class C power amplifier. The fundamental frequency of these pulses is

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Q. The Clapp oscillator shown in figure will operate at

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Q. Figure shows a zener circuit and characteristic of the zener used. If R2 is the lowest load resistance, then for proper voltage regulation R1 must be

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Q. In figure, VC is approximately equal to

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Q. Figure shows small signal model of CB amplifier circuit. Then I and R are respectively equal to

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Q. Figure represents a

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Q. In figure VBE = 0.7 V. If base current required to saturate the transistor is 0.1 mA, Vi =

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Q. As per miller theorem the circuit of figure (1) can be replaced by that in figure (2) If V1/V2 = K, then Y1 and Y2 are equal to

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Q. In a biased JFET (Figure) the shape of the channel is as shown because

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Q. In a half wave rectifier, Vrms is

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Q. The approximate value of input impedance of a common emitter amplifier with emitter resistance Re is given by

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Q. The collector voltage VC of the circuit shown in the given figure aside is approximately

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Q. The symbol shown in figure represents a

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Q. Which of the following represents the equivalent circuit of a crystal for crystal oscillator?

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Q. In figure, the function of resistor R is

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Q. The circuit of figure is

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Q. In figure output impedance of amplifier is

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Q. In figure VCEQ for each transistor is

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Q. A multistage amplifier has a low pass response with three real poles at s = - w1 - w2 and w3. The approximate overall bandwidth B of the amplifier will be given by

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