# Semiconductor Electronics Materials Devices And Simple Circuits

## There is a sudden increase in current in zener diode is

A
Due to rupture of bonds
B
Resistance of deplection layer becomes less
C
Due to high doping
D
Due to less doping
Medium
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## A p-n junction diode cannot be used

A
as a rectifier.
B
for converting light energy to electric energy.
C
for getting light radiation.
D
for increasing the amplitude of an AC signal.
Medium
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## AND gate

A
it has no equivalence to switching circuit.
B
it is equivalent to series switching circuit.
C
it is equivalent to parallel switching circuit.
D
it is a mixture of series and parallel switching circuit.
Medium
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A
OR gates
B
AND gates
C
NOT gates
D
NAND gates
Medium
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## NAND and NOR gates are called universal gates because they

A
are universally available.
B
can be combined to produce OR, AND and NOT gates.
C
are widely used in the integrated circuits.
D
can be easily manufactured.
Medium
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