The ratio of forward bias to reverse bias resistance of p-n junction diode is

Question

The ratio of forward bias to reverse bias resistance of p-n junction diode is (A) 10-1:1  (B) 10-2:1  (C) 10-3:1 (D) 10-4:1

Tardigrade Admin · Accepted Answer

Approximate resistance of p-n junction in forward bias, Rf=102Ω Approximate resistance of p-n junction in reverse bias, Rr=106Ω ∴ (Rf/Rr) =(102/106)=(10-4/1) ⇒ Rf: Rr =10-4: 1

Q. The ratio of forward bias to reverse bias resistance of $p - n$ junction diode is

$1 0^{- 1} : 1$

$1 0^{- 2} : 1$

$1 0^{- 3} : 1$

$1 0^{- 4} : 1$

Approximate resistance of $p - n$ junction in forward bias,
$R_{f} = 1 0^{2} Ω$
Approximate resistance of $p - n$ junction in reverse bias,
$R_{r} = 1 0^{6} Ω$
$∴ \frac{R _{f}}{R _{r}} = \frac{1 0 ^{2}}{1 0 ^{6}} = \frac{1 0 ^{- 4}}{1}$
$\Rightarrow R_{f} : R_{r} = 1 0^{- 4} : 1$

Q. The ratio of forward bias to reverse bias resistance of p−n junction diode is

10−1:1

10−2:1

10−3:1

10−4:1