Q. A generator with an internal resistance of 600 Ω drives an amplifier whose input resistance is 400 Ω. The generator's open circuit voltages is 1 mV; the amplifier develops 100mV across an 8kΩ load. The input voltage to the amplifier is

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Q. In a class C amplifier, full cycle conductor of the current is achieved by employing

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Q. Higher order active filters are used for variable

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Q. Which of the following statement is false?

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Q. Assertion (A): The main use of Miller integrator is to generate ramp

Reason (R): An inverting amplifier can handle more than one input at the same time.

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Q. Assertion (A): The duty cycle of a class C amplifier affects the power dissipation of transistor

Reason (R): At higher harmonics the efficiency of a class C amplifier becomes poor

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Q. In a self bias circuit for CE amplifier the collector supply voltage is made twice. The collector current will

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Q. In a full wave voltage doubler circuit, the input frequency is 560 Hz. The ripple frequency is

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Q. Assertion (A): A tuned amplifier uses a parallel tuned circuit

Reason (R): A tuned amplifier is used to amplify a narrowband frequencies

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Q. Thermal run away of a transistor occurs when

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Q. JFET has __________ degree of isolation between input and output, and a __________ noise figure.

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Q. The advantage of FET over BJT is

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Q. The MOSFET is almost ideal as a switching device because

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Q. The input and output signals for CE amplifier are always

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Q. In a one pole active low pass filter, the cut off frequency is fc. Then

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Q. Turn off time of a transistor switch is equal to (where ts is storage time and tf is fall time.)

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Q. In a CE amplifier circuit the emitter by pass capacitor is remove. The ac output voltage

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Q. In a differential amplifier, CMRR can be improved by using an increased

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Q. If ac resistance of diode is re, then In CE, BJT amplifier the input impedance is

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Q. The voltage gains of an amplifier without feedback and with negative feedback respectively are 100 and 20. The percentage of negative feedback (β) would be

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