Question

Match items in Group 1 with items in Group 2, most suitably.
Group 1 Group 2
P. LED 1. Heavy doping
Q. Avalanche photo diode 2. Coherent radiation
R. Tunnel diode 3. Spontaneous emission
S. LASER 4. Current gain
(A) P - 1, Q - 2, R - 4, S - 3
(B) P - 2, Q - 3, R - 1, S - 4
(C) P - 3 Q - 4, R - 1, S - 2
(D) P - 2, Q - 1, R - 4, S - 3

Answer 1

Answer:

The correct answer is (C) P - 3 Q - 4, R - 1, S - 2

Explanation:

LED - Spontaneous emission

Avalanche photo diode - current gain

tunnel diode - heavy doping

laser - coherent radiation

LED works on the principal of spontaneous emission.

In the avalanche photo diode due to the avalanche effect there is large current gain.

Tunnel diode has very large doping.

LASER diode are used for coherent radiation.

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