Question

13.
A pn junction acts as a
(1 Point)
Controlled switch
Bidirectional switch
Unidirectional switch
None of the above

Answer 1

A pn junction acts as an electrical switch.

Explanation:

• A pn junction acts as an electrical switch.
• When the pn junction is in forwarding biase it acts as close circuited and when the pn junction is in the reversed biased it acts as open circuit.
• Hence, due to such change in the forward biased and reverse biased makes the diode work as a switch.
• The forward biased being the ON and the reverse biased being the OFF state.
• Hence, it acts as a unidirectional switch.
• The correct option is (C)

Answer 2

Explanation:

A pn junction acts as a undirectional switch