Q. Which of the following amplifier circuits has highest input impedance?

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Q. Which of the following device acts as an N-P-N and a P-N-P transistor connected base to base and emitter to controller?

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Q. A differentiating amplifier has capacitor in the input path.

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Q. Which of the following statement about TRIAC is incorrect?

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Q. A half wave diode rectifier and full wave diode bridge rectifier both have an input frequency of 50 Hz. The frequencies of outputs respectively are

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Q. Overall efficiency of class B amplifier is

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Q. For a transistor to have-a larger β it must have and a

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Q. JFET is also known as

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Q. Drain feedback bias is often used with

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Q. CMRR of a difference amplifier is equal to

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Q. The ac collector current is nearly equal to

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Q. From a measurement of the rise time of the output pulse of an amplifier whose input is a small amplitude square wave, one can estimate the following parameter of the amplifier

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Q. In an amplifier, if the output current flows for 120° of the input cycle, the class of amplifier will be

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Q. Assertion (A): If we overdrive an amplifier the output signal may get clipped

Reason (R): To dissipate heat to atmosphere a heat sink is sometimes attached to the case of transistor

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Q. Which op-amp circuit uses a diode as one of the circuit components?

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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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