Q. A three-section RC phase shift oscillator has R = 10K ohms and C = 0.001 μF. The frequency of oscillations is

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Q. Assertion (A): Electric coupling, magnetic coupling and ground loop can cause unwanted high frequency oscillations.

Reason (R): Hartley oscillator uses a tapped inductor

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Q. In CB amplifier the distortion of the input voltage waveform may occur due to

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Q. As compared to full wave rectifier, a half wave rectifier

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Q. Assertion (A): A self bias circuit is the most commonly used bias circuit for bipolar junction transistors

Reason (R): A self bias circuit limits the increase in collector or emitter current due to change in junction temperature.

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Q. In an amplifier if conductor during the cycle is from 0 to 90° and again from 180° to 270°, the amplifier will be termed as

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Q. A sine wave with slew rate distortion looks like

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Q. If the Q of a single-stage single-tuned amplifier is doubled, then its bandwidth will

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Q. A boot strap generally incorporates

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Q. The common-drain amplifier, better known as the source follower, has a voltage gain __________ and the output signal is __________ with the input signal.

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Q. Power transistors are invariably provided with

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Q. Assertion (A): The ac load line is different from dc load line

Reason (R): The ac load resistance seen by collector and emitter is different from dc load resistance

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Q. In a class C operation VCC = 40 V and VCE(sat) = 0.4 V. The efficiency is

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Q. The absolute values of pinch-off voltage and gate-source cut-off voltage are

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Q. Which of the following circuit does not need a coupling capacitor?

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Q. Assertion (A): A large negative feedback is deliberately introduced in an amplifier to make its gain independent of variation is in parameters of active device and other components.

Reason (R): A large negative feedback results in a high value of return difference compared to unity which makes the feedback gain inversely proportional to feedback factor.

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Q. In case of a transistor amplifier the emitter resistance Re is removed

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Q. In oscillators class C operation is preferred because

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Q. In a common emitter circuit all voltages are measured with respect to

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Q. The h parameter equivalent to ac resistance re is

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