A circular coil of radius 5 cm is placed in uniform magnetic field of 0 07 T, so that the - Science - Magnetic Effects of Electric Current

Question

A circular coil of radius 5 cm is placed in uniform magnetic field
of 0 07 T, so that the direction of magnetic field is normal, to
the plane of the coil If an emf of 1 1 V is induced in it as a
result of its rotation through 180 deg in 0 14 seconds, the no of
turns in the coil is

(a) 70
(b) 80
(c) 140
(d) 160

Ravi Gupta · Accepted Answer

Dear Student
Kindly find the answer of your asked query

emf induced in the coil is given by:e= -dϕdte=-NBAcosθtN= -etBAcosθ=-1
1×0 140
07×π×5×10-22 cos180≈280 N is the no
 of turns

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