Special Diodes – Exercise – 3

116. An 8.2 V zener has a resistance of 5. The actual voltage across its terminals when the current is 25 mA is

(a) 8.2 V.
(b) 125 mV.
(c) 8.325 V.
(d) 8.075 V.

Answer
Answer : (c)
Explanation
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117. A laser diode normally emits

(a) coherent light.
(b) monochromatic light.
(c) coherent and monochromatic light.
(d) neither coherent nor monochromatic light.

Answer
Answer : (c)
Explanation
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118. The normal operating region for a zener diode is the

(a) forward-bias region.
(b) reverse-bias region.
(c) zero-crossing region.
(d) reverse-breakdown region.

Answer
Answer : (d)
Explanation
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119. The process of emitting photons from a semiconductive material is called

(a) photoluminescence.
(b) gallium arsenide.
(c) electroluminescence.
(d) gallium phosphide.

Answer
Answer : (c)
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120. Nota

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