Multiple Choice QuestionsWhen npn transistor is used as amplifier
electrons move from base to collector
holes move from emitter to base
electrons move from collector to base
electrons move from collector to base
For a transistor amplifier in common emitter configuration having load impedance of 1 kΩ (hfe = 50 and hoe = 25) the current gain is
-5.2
-15.7
-24.8
-24.8
A piece of copper and another of germanium are cooled from room temperature to 77 K, the resistance of
each of them increases
each of them decreases
copper decreases and germanium increases
copper decreases and germanium increases
The manifestation of band structure in solids is due to
Heisenberg’s uncertainty principle
Pauli’s exclusion principle
Bohr’s correspondence principle
Bohr’s correspondence principle
B.
Pauli’s exclusion principle
According to Pauli's exclusion principle, the electronic configuration of a number of subshells existing in a shell and number of electrons entering each subshell is found. Hence, on the basis of Pauli's exclusion principle, the manifestation of band structure in solids can be explained.
When p-n junction diode is forward biased
the depletion region is reduced and barrier height is increased
the depletion region is widened and barrier height is reduced.
both the depletion region and barrier height reducedboth the depletion region and barrier height reduced
both the depletion region and barrier height reducedboth the depletion region and barrier height reduced
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