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Physics - Magnetism Question with Solution | TestHub

PhysicsMagnetismMagnetic torque & energyMedium2 minPYQ_2012

PhysicsMediumsingle choice

A wire of mass $100 g$ , length $1 m$ and current $5 A$ is balanced in mid air by a magnetic field $B$ , then find the value of $B$ .

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Answer:

Solution:

Here, $m = 100 g = 1 0^{- 1} kg, l = 1 m, I = 5 A$ For a wire balanced midway air by a magnetic field is $m g = I lB$ or $B = \frac{m g}{I l}$ $= \frac{1 0 ^{- 1} \times 10}{5 \times 1}$ $B = 0.2 T$

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

⏱ 2mℹ️ Source: PYQ_2012

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