Physics - Magnetism Question with Solution | TestHub
PhysicsMagnetismBiot-savart's & Ampere's Circuital lawMedium2 minQB
PhysicsMediumsingle choice
An electric current i enters and leaves a uniform circular wire of radius ' a ' through diametrically opposite points. A charged particle ' ' moving along the axis of the circular wire passes through its centre at speed v. The magnetic force acting on the particle when it passes through the centre has a magnitude-
Options:
Answer:
D
Solution:
The magnetic field at the center of the circular wire is zero. This is because the current entering and leaving through diametrically opposite points creates two semicircular paths carrying current in opposite directions, effectively canceling out the magnetic field at the center. Since the magnetic field B is zero, the magnetic force on the charged particle is also zero.
Stream:JEESubject:PhysicsTopic:MagnetismSubtopic:Biot-savart's & Ampere's Circuital law
⏱ 2mℹ️ Source: QB
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