Home
Class 12
PHYSICS
If a LED is forward biased, then...

If a LED is forward biased, then

A

electrons from the n - type side cross the p-n junction and recombine with holes in the p - type side

B

electron and holes neutralise each other in depletion region

C

at junction electrons and holes remain at rest

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Similar Questions

Explore conceptually related problems

When LED is forward biased, then

When a diode is forward biased, it has a voltage drop of 0.5 V. The safe limit of current through the diode is 10 mA. If a battery of emf 1.5 V is used in the circuit, the value of minimum resistance to be connected in series with the diode so that the current does not exceed the safe limit is :

When p-n junction diode is forward biased then

When p-n junction diode is forward biased then

p-n junction is called as forward biased when

Assertion : Light emitting diode (LED) emits spontaneous radiation. Reason : LED are forward biased p-n junctions.

A forward biased diode is

In the given circuit a silicon diode with knee voltage 0.7V is forward biased with a battery of e.m.f 8V. The current in the circuit is 40 mA. Find the power drop at resistor R and diode.

What happens to the width of depletion layer of a p-n junction when it is (i) forward biased, (ii) reverse biased?

When a p-n junction is reverse-biased,the current becomes almost constant at 25µA. current of when it is forward biased at 200 mV . a current of 75µA is obtained.Find the magnitude of diffusion current when the diode is (a)unbiased ,(b)reverse-biased at 200 mVand (c )forward-biased at 200mV.