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Physics - Magnetism Question with Solution | TestHub

PhysicsMagnetismMagnetic ForceMedium2 minQB

PhysicsMediumsingle choice

A current carrying loop is placed in a uniform magnetic field pointing in negative $z$ direction. Branch PQRS is a three quarter circle, while branch PS is straight. If force on branch PS is F, force on branch PQR is :-

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Answer:

Solution:

For the straight branch PS the effective length is $2 r$ , where $r$ is the radius of the circular part.

$F_{PS} = B i (2 r) = F$

For the semicircle PQR the effective length is the end-to-end distance $2 r$ .

$F_{PQR} = B i (2 r) = 2 (B i 2 r) = 2 F$

Stream:JEESubject:PhysicsTopic:MagnetismSubtopic:Magnetic Force

⏱ 2mℹ️ Source: QB

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