A silicon diode has a forward voltage drop of 1.2V for a forward DC current of 100mA . It has a reverse current of 10- 6mA for a reverse voltage of 10V . The bulk and reverse resistances of diode are :-

Question

A silicon diode has a forward voltage drop of 1.2V for a forward DC current of 100mA . It has a reverse current of 10- 6mA for a reverse voltage of 10V . The bulk and reverse resistances of diode are :- (A) 5 Ω, 10 mathrmM Ω (B) 6 Ω, 6 MΩ (C) 7 Ω, 70 mathrmM Ω (D) 5 Ω, 1 mathrmM Ω

Tardigrade Admin · Accepted Answer

For a silicon diode, forbidden gap is of the order of

0.7 V

∵

Bulk resistance

= \frac{( 1.2 - 0.7 ) V}{100 \times 1 0 ^{- 3} A}

= 0.5 \times 10Ω

= 5Ω

Reverse resistance

= \frac{10 V}{1 \times 1 0 ^{- 6} A} = 10 M Ω

Q. A silicon diode has a forward voltage drop of $1.2 V$ for a forward DC current of $100 m A$ . It has a reverse current of $1 0^{- 6} m A$ for a reverse voltage of $10 V$ . The bulk and reverse resistances of diode are :-

$5Ω, 10 M Ω$

$6Ω, 6 M Ω$

$7Ω, 70 M Ω$

$5Ω, 1 M Ω$

For a silicon diode, forbidden gap is of the order of $0.7 V$
$∵$ Bulk resistance $= \frac{( 1.2 - 0.7 ) V}{100 \times 1 0 ^{- 3} A}$
$= 0.5 \times 10Ω$
$= 5Ω$
Reverse resistance $= \frac{10 V}{1 \times 1 0 ^{- 6} A} = 10 M Ω$

Q. A silicon diode has a forward voltage drop of 1.2V for a forward DC current of 100mA . It has a reverse current of 10−6mA for a reverse voltage of 10V . The bulk and reverse resistances of diode are :-

5Ω,10MΩ

6Ω,6MΩ

7Ω,70MΩ

5Ω,1MΩ