Q. Magnetic recording tape is most commonly made from

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Q. The Ni-Zn ferrites are used for audio and TV transformers is that

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Q. Hall's effect can be used to measure

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Q. For insulators the energy gap is of the order of

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Q. When electronic emission occurs due to bombardment of high velocity electrons on a metal surface, it is called secondary emission.

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Q. The reverse saturation current depends on the reverse bias.

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Q. In n channel JFET, the gate voltage is made more negative

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Q. Metals approach superconductivity conditions

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Q. The phenomenon known as "Early effect" in a BJT refers to a reduction of the effective base width caused by

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Q. At absolute zero temperature a semiconductor behaves like

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Q. In a 741 OP-amp, there is 20 dB/decade fall-off starting at a relatively low frequency. This is due to

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Q. The current due to thermionic emission is given by Richardson Dushman equation.

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Q. The thermionic emission current is given by

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Q. In forward active region, the operation of a BJT

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Q. The conductivity of a semiconductor crystal due to any current carrier is not proportional to

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Q. A P-N junction diode dynamic conductance is directly proportional to

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Q. Gold is often diffused into silicon P-N junction devices to

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Q. In a solar cell, the photovoltaic voltages is the voltage at which the resultant current is

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Q. The forbidden energy gap between the valence band and conduction band will be wide in case of

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Q. At 0 K the forbidden energy gap in intrinsic semi conductor is about

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