Q. In which mode of BJT operation are both junctions reverse biased?

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Q. In a bipolar transistor, the emitter base junction has

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Q. Which of these has semi-conductor metal junction?

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Q. The ripple factor of power supply is a measure of

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Q. The product kT (where k is Boltzmann's constant and T is absolute temperature) at room temperature is about

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Q. If E is energy level of electron and EF is fermi level, and T = 0 and E > EF, then

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Q. Which variety of copper has the best conductivity?

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Q. The number of valence electrons in a silicon atom is

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Q. In a JFET VDS exceeds the rated value. Then it operates in

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Q. In LED the radiation is in

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Q. The rate of change of excess carrier density is proportional to carrier density.

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Q. Tuned voltage amplifiers are not used

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Q. The main reason why Ni-Zn ferrites are used for audio and T.V. transformers is that

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Q. Assertion (A): When light falls at junction of p-n photodiode, its p side becomes positive and n side becomes negative.

Reason (R): When a photodiode is short circuited, the current in the external circuit flows from p side to n side.

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Q. In what condition does BJT act like an open switch

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Q. In a JFET

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Q. A power supply has full-load voltage of 20 V. What will be its no load voltage when its voltage regulation is 100%

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Q. For a photo conductor with equal electron and hole mobilities and perfect ohmic contacts at the ends, an increase in the intensities of optical illumination results in

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Q. Ferrities are particularly suited for high frequency applications because of their

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Q. In intrinsic semiconductor, the fermi level

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