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Physics - Magnetism Question with Solution | TestHub

PhysicsMagnetismBiot-savart's & Ampere's Circuital lawMedium2 minPYQ_2021

PhysicsMediumsingle choice

A thin ring of radius ' $R$ ' meter has charge ' $q$ ' coulomb uniformly spread on it. The ring rotates about its axis with a constant frequency of $f$ revolution/s. The value of magnetic induction in $Wb m^{- 2}$ at the center of the ring is ( $μ_{0} =$ Permeability of free space)

Options:

Answer:

Solution:

For circular coil of radius $R$ carrying a current $I$ , the magnetic field at the center is given by $B = \frac{μ _{0} I}{2 R}$ Here $I = qf$ $∴ B = \frac{μ _{0} qf}{2 R}$

Stream:MHT_CETSubject:PhysicsTopic:MagnetismSubtopic:Biot-savart's & Ampere's Circuital law

⏱ 2mℹ️ Source: PYQ_2021

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