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Physics - EMI/AC Question with Solution | TestHub

PhysicsEMI/ACFaraday law/Lenz lawMedium2 minQB

PhysicsMediumsingle choice

The magnetic field in a coil of 100 turns and 40 cm $^{2}$ an area is increased from 1 tesla to 6 tesla in 2 second. The magnetic field is perpendicular to the coil. The average e.m.f. generated in it is :

Options:

Answer:

Solution:

Convert the area to SI units.

$A = 40 \times 1 0^{- 4} = 4 \times 1 0^{- 3} m^{2}$

$∣ E ∣ = \frac{N A Δ B}{Δ t}$

$∣ E ∣ = \frac{100 ( 4 \times 1 0 ^{- 3} ) ( 6 - 1 )}{2} = 1 V$

Answer C.

Stream:JEESubject:PhysicsTopic:EMI/ACSubtopic:Faraday law/Lenz law

⏱ 2mℹ️ Source: QB

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