A coil of area A and N turns is rotating with angular velocity ω in a uniform magnetic field B about an axis perpendicular to B . Magnetic flux φ and induced emf ε across it, at an instant when B is p

Question

A coil of area A and N turns is rotating with angular velocity ω in a uniform magnetic field B about an axis perpendicular to B . Magnetic flux φ and induced emf ε across it, at an instant when B is parallel to the plane of coil, are :

TestHub · Accepted Answer

ϕ ε ​ = BAN ⋅ cos ( ω t ) = dt − d ϕ ​ = BA ω N ⋅ sin ( ω t ) ​ When B is parallel to plane, ω t ​ ​ = 2 π ​ ⇒ ϕ = 0 , ε = BA ω N

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