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PhysicsEMI/ACMotional & Rotational EMFMedium2 minPYQ_2020

PhysicsMediumsingle choice

A square coil of side $25 cm$ having $1000$ turns is rotated with a uniform speed in a magnetic field about an axis perpendicular to the direction of the field. At an instant $t$ , the EMF induced in the coil is $E = 200 \sin 100 πt$ . The magnetic induction is

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Answer:

Solution:

$e = 200 \sin 100 πt$

We have,

$e_{0} = 200$

$ω = 100 π$

$∴ BANω = e_{0}$

$∴ B = \frac{e_{0}}{ANω}$

$B = \frac{200}{(0 .25 \times 0 .25) \times 1000 \times 100 π}$

Or $B = 0 .01 T$

Stream:JEESubject:PhysicsTopic:EMI/ACSubtopic:Motional & Rotational EMF

⏱ 2mℹ️ Source: PYQ_2020

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