A coil has an area of 0.05 m2 and has 800 turns. After placing the coil in a magnetic field of strength 4× 10-5Wbm-2 perpendicular to the field, the coil is rotated through 90o in 0. Is. The average emf induced is

Question

A coil has an area of 0.05 m2 and has 800 turns. After placing the coil in a magnetic field of strength 4× 10-5Wbm-2 perpendicular to the field, the coil is rotated through 90o in 0. Is. The average emf induced is (A) zero (B) 0.016V (C) 0.01V (D) 0.032V

Tardigrade Admin · Accepted Answer

Induced emf e=(dφ/dt)=(NAdB/dt) =800× 0.05× (4× 10-5/0.1) =0.016 V

Q. A coil has an area of $0.05 m^{2}$ and has 800 turns. After placing the coil in a magnetic field of strength $4 \times 10^{- 5} Wb m^{- 2}$ perpendicular to the field, the coil is rotated through $90^{o}$ in 0. Is. The average emf induced is

zero

0.016V

0.01V

0.032V

Induced emf
$e = \frac{d ϕ}{d t} = \frac{N A d B}{d t}$
$= 800 \times 0.05 \times \frac{4 \times 10 ^{- 5}}{0.1}$
$= 0.016 V$

Q. A coil has an area of 0.05m2 and has 800 turns. After placing the coil in a magnetic field of strength 4×10−5Wbm−2 perpendicular to the field, the coil is rotated through 90o in 0. Is. The average emf induced is