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Physics - Magnetism Question with Solution | TestHub

PhysicsMagnetismMiscellaneousMedium3 minQB

PhysicsMediummultiple choice

A large plate with uniform surface charge density $σ$ is moving with constant speed v as shown in the figure. The magnetic field at a small distance from plate is :

diagram

Options:(select one or more)

Answer:

B, D

Solution:

The moving charged plate is a surface current of $σ v$ per unit width.

Ampere's law around the plate: $2 B ℓ = μ_{0} σ v ℓ \Rightarrow B = \frac{μ _{0} σ v}{2}$ - (B) correct, (A) wrong.

The field runs parallel to the plate (perpendicular to v) - (D) correct, (C) wrong.

Stream:JEESubject:PhysicsTopic:MagnetismSubtopic:Miscellaneous

⏱ 3mℹ️ Source: QB

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