Q.

Which of the following circuits represents a forward biased diode ?
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Choose the correct answer from the options given below :

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a

(B), (D) and (E) only

b

(A) and (D) only

c

(C) and (E) only

d

(B), (C) and (E) only

answer is C.

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Detailed Solution

A diode is said to be forward biased if p-side is at higher potential than n -side of p-n junction.

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(A) p-side is at lower potential than n-side. Thus, connected in reverse biased.

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(B) p-side is at higher potential than n-side. Thus, connected in forward biased.

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(C) p-side is at higher potential than n-side. Thus, connected in forward biased.

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(D) p-side is at lower potential than n-side. Thus, connected in reverse biased.

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(E) p-side is at higher potential than n-side. Thus, connected in forward biased.

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