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Question
A square-shaped coil of side 10 cm, having 100 turns is placed perpendicular to a magnetic field which is increasing at 1 T/s. The induced emf in the coil is ______.
Options
0.1 V
0.5 V
0.75 V
1.0 V
Solution
A square-shaped coil of side 10 cm, having 100 turns is placed perpendicular to a magnetic field which is increasing at 1 T/s. The induced emf in the coil is 1.0 V.
Explanation:
Given, no. of turns (N) = 100, side of square = 10 cm
Rate of change of magnetic field `(dB)/(dt) = 1 T/S`
∴ Emf of coil = `NA (dphi)/(dt)`
= `100 xx (0.1 xx 0.1) xx 1`
ε = 1 V
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