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Physics - Magnetism Question with Solution | TestHub

PhysicsMagnetismMiscellaneousEasy2 minPYQ_2020

PhysicsEasysingle choice

A coil having $200$ turns has a surface area of $0.15 m^{2}$ . A magnetic field applied perpendicular to the coil changes from $0.2 T$ to $0.6 T$ in $0.4 s$ , then the induced emf $[$ in $V]$ is

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Answer:

Solution:

$ϕ = n \times A \times B$

Where $n \equiv$ No. of turns

$A \equiv$ Area of loop

$B \equiv$ Magnetic field

$∴ ε = \frac{Δ ϕ}{Δ t} = n A \frac{Δ B}{Δ t}$

$= 200 \times 0.15 \times \frac{0.6 - 0.2}{0.4} = 30 V$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:MagnetismSubtopic:Miscellaneous

⏱ 2mℹ️ Source: PYQ_2020

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