Assertion: When `PN`-junction is forward biased then motion of charge carriers at junction is due to diffusion. In reverse biasing. The cause of motion of charge is drifting.
Reason: In the following circuit emitter is reverse biased and collector is forward biased.

Options

A. If both the assertion and reason are true and reason is a true explantion of the assertion.
B. If both the assertion and reason are true but the reason is not true the correct explantion of the assertion.
C. If the assertion is true but reason false
D. If both the assertion and reason are false.

Answer

B

Explanation

In forward biasing of `PN` junction current flows due to diffustion of majority charge carriers. While in reverse biasing current flows due to drifting of minority charge carriers.
The circuit given in the reason is a `PNP` transistor having emitter is more negative w.r.t. base so it is reverse biased and collector is more positive w.r.t. base so it is forward biased.