In the circuit shown in figure, the silicon and germanium diodes start conducting at 0.7 V and 0.3 V respectively. What are the values of V0 and I ?

Question

In the circuit shown in figure, the silicon and germanium diodes start conducting at 0.7 V and 0.3 V respectively. What are the values of V0 and I ? <img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/physics/e0a5567007b7bf186a67358b8134ae9b-.png" /> (A) 12 V, 2.4 mA (B) 11.7 V, 2.34 mA (C) 11.3 V, 2.26 mA (D) 11 V, 2.2 mA

Tardigrade Admin · Accepted Answer

The germanium diode will start conducting before the silicon diode does so. The voltage across

G e = 0.3 V

. The output voltage

V_{0}

is the voltage across

R = 12 - 0.3 = 11.7 V

The current

I = \frac{11.7 V}{5 k Ω}

= \frac{11.7}{5 \times 1 0 ^{3}}

= 2.34 \times 1 0^{- 3} A

= 2.34 m A

Q. In the circuit shown in figure, the silicon and germanium diodes start conducting at $0.7 V$ and $0.3 V$ respectively. What are the values of $V_{0}$ and $I$ ?

$12 V, 2.4 m A$

$11.7 V, 2.34 m A$

$11.3 V, 2.26 m A$

$11 V, 2.2 m A$

The germanium diode will start conducting before the silicon diode does so. The voltage across $G e = 0.3 V$ . The output voltage $V_{0}$ is the voltage across
$R = 12 - 0.3 = 11.7 V$
The current $I = \frac{11.7 V}{5 k Ω}$
$= \frac{11.7}{5 \times 1 0 ^{3}}$
$= 2.34 \times 1 0^{- 3} A$
$= 2.34 m A$

Q. In the circuit shown in figure, the silicon and germanium diodes start conducting at 0.7V and 0.3V respectively. What are the values of V0​ and I ?

12V,2.4mA

11.7V,2.34mA

11.3V,2.26mA

11V,2.2mA