Assertion: Free electrons always keep on movi | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) In the absence of an electric current,the free electrons in a conductor are in a state of random motion,similar to molecules in a gas. Their avera

Vedclass · Accepted Answer

If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.

Vedclass · Answer

(A) In the absence of an electric current,the free electrons in a conductor are in a state of random motion,similar to molecules in a gas. Their average velocity is zero,meaning they do not have any net velocity in a specific direction. As a result,there is no net magnetic force on the free electrons in a magnetic field. When a current is passed,the free electrons acquire a drift velocity in a definite direction,and consequently,a magnetic force acts on them (provided the magnetic field has a component perpendicular to the direction of flow).

Assertion: Free electrons always keep on moving in a conductor,even then no magnetic force acts on them in a magnetic field unless a current is passed through it.
Reason: The average velocity of free electrons is zero.

Similar Questions

The drift velocity of the electrons in a copper wire of length $2\ m$ under the application of a potential difference of $200\ V$ is $0.5\ m/s$. Their mobility (in $m^2 V^{-1} s^{-1}$) is

$A$ metallic block has no potential difference applied across it. What is the mean velocity of free electrons in terms of $T$ (absolute temperature of the block)?

Drift velocity $V_d$ varies with the intensity of electric field $E$ as per the relation:

What is relaxation time?

Vedclass Test Series

Exam Paper Generator

Online Exam Module

Assertion: Free electrons always keep on moving in a conductor,even then no magnetic force acts on them in a magnetic field unless a current is passed through it.Reason: The average velocity of free electrons is zero.