Question

In the following circuit, the current flowing through $1k\Omega$ resistor is

• A. 0 mA
• B. 5 mA
• C. 10 mA
• D. 15 mA
• E. 20 mA

Answer 1

Answer: (B)

Voltage across zener diode will always constant.
$V=IR$
$\therefore$ $5=I\times {10}^3$
Or $I=\frac{5}{{10}^3}$
Or $I=5\times {10}^{-3}$
Or $I=5mA$