If the forward bias on \( p-n \) junction is increased from zero to...

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If the forward bias on \( p-n \) junction is increased from zero to \( 0.045 \mathrm{~V} \), then no current flows in the circuit.
\( \mathrm{P} \)
The contact potential of junction i.e., \( \mathrm{V}_{\mathrm{B}} \) is:
W
(1) zero
(2) \( 0.045 \mathrm{~V} \)
(3) more than \( 0.045 \mathrm{~V} \)
(4) less than \( 0.045 \mathrm{~V} \)
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