Question

The value of power dissipated across the Zener diode (V_z = 15 V) connected in the circuit as shown in the figure is x × 10^–1 watt. The value of x, to the nearest integer, is ______.

पर्याय

• 1

• 2

• 3

• 5

Answer 1

The value of power dissipated across the Zener diode (V_z = 15 V) connected in the circuit as shown in the figure is x × 10^–1 watt. The value of x, to the nearest integer, is 5.

Explanation:

Voltage across 350 = (22 - 15) = 7V

Current across R_s, I = `7/35=1/5` A

Current across R_L, I₂ = `15/90 = 1/6` A

So, I₁ = I - I₂ 

= `1/5-1/6`

= `1/30`A

The power dissipated across the Zener diode.

= 15 × `1/30`

= 0.5 W

= 5 × 10^-1 W

Hence, x = 5.