Question

The current in the given circuit is:

(Given barrier potential of the diode = $0.5V$)

• A. $4mA$
• B. $4A$
• C. $4\mu A$
• D. $40\mu A$

Answer 1

Answer: (A)

$4mA$

Given:
$V=4.5V$
$V_D=0.5V$
$R=1K\Omega =1000\Omega$
The current in the circuit is
$I=\frac{V-V_D}{R}$

$I=\frac{4.5-0.5}{1000}$

$I=\frac{4}{1000}$

$I=4\times {10}^{-3}=4mA$