NEET Class neet Answered
EmI lesson
Asked by praveenpriya000079 | 18 Apr, 2024, 07:24: AM
Expert Answer
By Faraday's law of induction, we get Induced EMF E = - ( dΦ / dt )
where Φ = B × A , is flux of magnetic field , B is magnetic field induction and A is area of loop .
When the shape of loop chages from square to circle change in area gives induced EMF .
Square loop area As = 0.22 × 0.22 m2 . = 4.840 × 10-2 m2
Circumference of circular loop = circumference of square loop
Let R be the radius of circular loop
2π R = 0.22 × 4 m = 0.88 m
R = 0.88 / (2π) m = 0.14 m
Area of circular loop = π (0.14)2 = 6.162 × 10-2 m2
Induced EMF E = - ( dΦ / dt ) = -d/dt ( B × A ) = - B × (dA/dt) .
E = - { 0.2 × [ 6.162 - 4.840 ] × 10-2 } / 0.4 V = - 6.61 × 10-3 V
Answered by Thiyagarajan K | 18 Apr, 2024, 10:49: AM
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