MCQ
Given below are two statements: one is labelled as Assertion $A$ and the other is labelled as Reason $R$

Assertion $A:$ Diffusion current in a $p-n$ junction is greater than the drift current in magnitude if the junction is forward biased.

Reason $R:$ Diffusion current in a $p-n$ junction is from the $n$-side to the $p$-side if the junction is forward biased.

In the light of the above statements, choose the most appropriate answer from the options given below

  • A
    Both $A$ and $R$ are correct and $R$ is the correct explanation of $A$
  • B
    Both $A$ and $R$ are correct but $R$ is NOT the correct explanation of $A$
  • $A$ is correct but $R$ is not correct
  • D
    $A$ is not correct but $R$ is correct

Answer

Correct option: C.
$A$ is correct but $R$ is not correct
c
In forward biased condition, diffusion of majority charge carriers takes place from $p$-side to $n$-side which constitute the diffusion current.

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

1000 small water drops each of radius r and charge q coalesce together to form one spherical drop. The potential of the big drop is larger than that of the smaller drop by a factor of
An $\alpha$-particle (mass $4 amu$ ) and a singly charged sulfur ion (mass $32 amu$ ) are initially at rest. They are accelerated through a potential $V$ and then allowed to pass into a region of uniform magnetic field which is normal to the velocities of the particles. Within this region, the $\alpha$-particle and the sulfur ion move in circular orbits of radii $r_\alpha$ and $r_5$, respectively. The ratio $\left(r_s / r_\alpha\right)$ is. . . . .$(4)$
When a PN junction diode is reverse biased
When a photon of light collides with a metal surface, number of electrons, (if any) coming out is
A free electron is placed in the path of a plane electromagnetic wave. The electron will start moving:
The diagram shows a silvered equiconvex lens. An object of length $1\,cm$ has been placed in the front of the lens. What will be the final image properties? The refractive index of the lens is $\mu$ and the refractive index of the medium in which the lens has been placed is $2\mu$ . Both the surface have the radius $R.$
The momentum of a photon is $2 \times {10^{ - 16}}gm-cm/sec$. Its energy is
The internal resistance of a cell depends on
For a plane electromagnetic wave propagating in $x$-direction, which one of the following combination gives the correct possible directions for electric field $(E)$ and magnetic field $(B)$ respectively?
The total energy of an electron in the $n^{t h}$ stationary orbit of the hydrogen atom can be obtained by