Q. Which one of the following power amplifier has the maximum efficiency?

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Q. Negative feedback lowers the cut off frequency and increase the upper cut off frequency of amplifier.

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Q. In a single-stage RC coupled common emitter amplifier, the phase shift at the lower 3 dB frequency is

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Q. If the thermal resistance of a transistor is lower it means

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Q. A Darlington pair has β = 300. If RE = 1 kΩ and RL = 100 Ω, the input impedance at the base is approximately

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Q. Barkhausen criterion is 1 + Avβ = 0.

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Q. The voltage gain of which transistor configuration is less than unity?

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Q. Linear transistor circuits always operate in

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Q. The common emitter short circuit current gain β of a transistor

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Q. A complementary symmetry amplifier has

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Q. The units of q/KT are

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Q. A FET has

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Q. A TRIAC is a semiconductor device which acts as a

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Q. Which of the following uses a capacitor in the feedback path?

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Q. In an inverting amplifier using op-amp the current input to the inverting terminal

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Q. For a transistor the normal collector voltage is 12 V. If actually it is found to be + 28 V, the trouble could be

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Q. In a CE transistor amplifier, when collector-emitter voltage increases

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Q. Logarithmic amplifiers are used in

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Q. Negative feedback is used in audio amplifiers to

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Q. A BJT amplifier has a power gain of 0.5 from source to base. The power gain in dB is

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