JEE Main 2025 Physics question
A coil of area A and N turns is rotating with angular velocity ω in a uniform magnetic field about an axis perpendicular to . Magnetic flux ϕ and induced emf ε across it, at an instant when B is parallel to the plane of coil, are :
Answer: (2)
Solution
φ=BAN cos(ωt), ε=BANω sin(ωt). When B parallel to plane, ωt=π/2, φ=0, ε=BANω.