Q. - ve feedback in an amplifier

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Q. Which of the following is not a semiconductor?

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Q. At absolute temperature

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Q. If E is electric field intensity, the current density due to field emission is proportional to

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Q. When a high voltage reference is required it is advantageous to use two or more zener diodes in series to allow

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Q. Assertion (A): When p-n junction is forward biased, steady current flows.

Reason (R): When a p-n junction is forward biased, free electrons cross the junction from n to p and holes from p to n.

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Q. The equivalent circuit of an ideal diode is

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Q. What is meant by "continuous collector current" in BJT?

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Q. Assertion (A): The frequency of light used for photoelectric emission is high.

Reason (R): As per Einstein's equation 0.5 mv² < hf - Uw.

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Q. The electric breakdown strength is affected by

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Q. When a diode is forward biased, the diode current is

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Q. At room temperature, the current in the, intrinsic semiconductor is due to

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Q. Which of these is also called 'hot carrier diode'?

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Q. A d.c. power supply has an open circuit voltage of 100 V. When the full load current is drawn, the output drops to 80 V. The percentage voltage regulation is

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Q. The ratio of impurity atoms to intrinsic semiconductor atoms in an extrinsic semiconductor is about.

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Q. To ensure that a zener diode does not get destroyed

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Q. SCR turns of from conducting state to blocking state on

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Q. The kinetic energy of free electrons in a metal is (where k is the de-Broglie wave number of the electron)

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Q. The turn on time of an SCR is 5 micro second. Its trigger pulse should have

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Q. From an n channel JFET for VDS constant and if VGS is made more negative, pinch off would occur at

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