Q. Tuned amplifiers are used at radio frequencies.

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Q. The knee voltages in silicon and germanium diodes respectively are

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Q. In calculating input impedance, the load impedance is considered to be connected at the output.

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Q. In a transistor βdc is likely to vary between 100 and 400. The proper value of βdc to be used to located Q point is

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Q. Which of the following noise becomes of great importance at high frequencies?

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Q. High cut off frequency can be expected in case of

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Q. Which coupling produces the minimum interference with frequency response?

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Q. Assertion (A): A sine wave with slew rate distortion looks rectangular

Reason (R): The maximum rate of output voltage change is called slew rate

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Q. In a P-N-P transistor, electrons flow

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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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