Kelvi

An infinitely long straight conductor carries a current of 5 A as shown. An electron is moving with a speed of $10^5$ m/s parallel to the conductor. The perpendicular distance between the electron and the conductor is $20$ cm at an instant. Calculate the magnitude of the force experienced by the electron at that instant.

medium

Moving Charges and Magnetism

2021

physics

$4 \times 10^{-20}$ N

$8\pi \times 10^{-20}$ N

$4\pi \times 10^{-20}$ N

$8 \times 10^{-20}$ N

Explanation

To solve this problem, we need to calculate the magnetic force on the electron due to the current in the conductor. $\\$ The magnetic field $B$ at a distance $r$ from an infinitely long straight conductor carrying current $I$ is given by: $\\ B = \frac{\mu_0 I}{2\pi r} \\$

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