MCQ
Diffusion current in a $p$-$n$ junction is greater than the drift current in magnitude :-
  • If the junction is forward-biased
  • B
    If the junction is reverse-biased
  • C
    If the junction is unbiased
  • D
    In no case.

Answer

Correct option: A.
If the junction is forward-biased
a
In forward bias potential barrier decreases

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

Assertion : A metal piece and a non-metal (stone) piece are dropped from the same height near earth’s surface. Both will reach the earth’s surface simultaneously.
Reason : There is no effect of earth’s magnetic field on freely falling body.
A voltmeter having a resistance of $998\, ohms$ is connected to a cell of $e.m.f.$ $2\, volt$ and internal resistance $2\, ohm$. The error in the measurement of $e.m.f.$ will be
Which sample contains greater number of nuclei : a $5.00- \mu Ci$ sample of $_{240}Pu$ (half-life $6560\,y$) or a $4.45 - \mu Ci$ sample of $_{243}Am$ (half-life $7370\, y$)
An $NPN$ transistor is used in common emitter configuration as an amplifier with $1\,k\Omega $ load resistance. Signal voltage of $10\,mV$ is applied across the base emitter. This produces a $3\,mA$ change in the collector current and $15\,\mu A$ change in the base current of the amplifier. The input resistance and voltage gain are
A positively charged particle projected towards east is deflected towards north by a magnetic field. The field may be:
For a metallic wire, the ratio $V/i$ ($V = $ the applied potential difference, $i$ = current flowing) is
A wire of length $L$ is bent in the form of a circular coil and current $i$ is passed through it. If this coil is placed in a magnetic field then the torque acting on the coil will be maximum when the number of turns is
In Young's double slit experiment maximum intensity is $I$ then the angular position where the intensity becomes $\frac{I}{4}$ is
The sum of all electromagnetic forces between different particles of a system of charged particles is zero:
In $P-$type semiconductor the majority and minority charge carriers are respectively