In a zener regulated power supply, a zener diode with Vz=6 V is used for regulation. The load current is 5 mA and unregulated input is 10 V (as shown). The value of series resistance (R) required is

Question

In a zener regulated power supply, a zener diode with Vz=6 V is used for regulation. The load current is 5 mA and unregulated input is 10 V (as shown). The value of series resistance (R) required is (A) 130 Ω (B) 160 Ω (C) 150 Ω (D) 240 Ω

Tardigrade Admin · Accepted Answer

Voltage drop across series resistance R ⇒ VR=10-6=4 V R=(Vr/I)=(4/25 × 10-3) =(4000/25)=160 Ω

Q. In a zener regulated power supply, a zener diode with $V_{z} = 6 V$ is used for regulation. The load current is $5 m A$ and unregulated input is $10 V$ (as shown). The value of series resistance $(R)$ required is

$130 Ω$

$160 Ω$

$150 Ω$

$240 Ω$

Voltage drop across series resistance $R$
$\Rightarrow V_{R} = 10 - 6 = 4 V$
$R = \frac{V _{r}}{I} = \frac{4}{25 \times 1 0 ^{- 3}}$
$= \frac{4000}{25} = 160 Ω$

Q. In a zener regulated power supply, a zener diode with Vz​=6V is used for regulation. The load current is 5mA and unregulated input is 10V (as shown). The value of series resistance (R) required is

130Ω

160Ω

150Ω

240Ω