SSC JE Electrical Engineering 22 Jan 2018 Evening Paper

Question : 130 of 200

Marks: +1, -0

What will be the magnitude of the induced EMF (in V) in a coil of area of 100 square centimeters with 200 turns, If the coil is removed from a magnetic field of 10 T acting at right angles to the coil in 1 second.

Validate

Solution:

Given data
A = 100

\cm^2

= 100 × 10^{–4} \m^2

N = 200
B = 10T
t= 1sec
V = ?
Magnitude of induced lmf

V={-Ndϕ}/{dt}=-NA{dB}/{dt}

[∵ ϕ = BA]

= -200 × 10^{–2} × (-10)

∴ V = 20 V

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