Question

In the given circuit, the current through the resistor $2k\Omega$ is :

• A. 2mA
• B. 4mA
• C. 6mA
• D. 1mA

Answer 1

The correct option is C 6mA

The diode here is on reverse bias. So, in ideal conditions, no current flows through the diode. It can be hence treated like an open circuit. The equivalent resistance of the ckt is given by,
$R_{eq}=1+2k\Omega =3k\Omega$

Using Ohm's law,

$V=IR$

or, $\frac{20}{3\times {10}^3}=I$

or, $I\approx 6mA$ is our required answer.