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Physics - Magnetism Question with Solution | TestHub

PhysicsMagnetismMagnetic torque & energyEasy2 minPYQ_2023

PhysicsEasysingle choice

A long straight wire of length $2 m$ and mass $250 g$ is suspended horizontally in a uniform horizontal magnetic field of $0.7 T$ . The amount of current flowing through the wire will be $(g = 9.8 ms^{- 2})$ NEET 2023 (Manipur)

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Solution:

we know $F = m g I ℓ B = m g$ $I = \frac{m g}{ℓ B} = \frac{250 \times 1 0 ^{- 3} \times 9.8}{( 2 ) ( 0.7 )}$ $I = 1750 \times 1 0^{- 3} A I = 1.75 A$

Stream:NEETSubject:PhysicsTopic:MagnetismSubtopic:Magnetic torque & energy

⏱ 2mℹ️ Source: PYQ_2023

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