51.
If a donor type impurity is added to the semiconductor, then at a given temperature, the Fermi Level

52.
In PN junction diode, P side is doped with acceptor concentration of 2 × 1016 cm-3, N side is doped donor concentration of 5 × 1017 cm-3. The contact potential of diode is:
Assume thermal equivalent voltage equal to 26 mV and intrinsic carrier concentration equal to 1.45 × 1010 cm-3.

53.
The forward amplification factor of a transistor corresponds to

56.
The capacitance of a reverse-biased PN junction

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