Question

A diode having potential difference $0.5V$ across its junction which does not depend on current, is connected in series with resistance of $20\Omega$ across source. If $0.1A$ current passes through resistance then what is the voltage of the source?

• A. $1.5V$
• B. $2.0V$
• C. $2.5V$
• D. $5V$

Answer 1

Answer: (C)

$2.5V$

$V^{\prime }=V+IR$

$V^{\prime }=0.5+0.1\times 20$

$V^{\prime }=2.5V$