Electromagnetic Induction

Magnetic flux through a plane

Magnetic flux through a plane in a uniform magnetic field is given by Φ = BA cosθ, where θ is the angle between the area vector and the magnetic field

Faraday's first law states that when

Faraday's first law states that when magnetic flux through a circuit changes, an emf is induced. The induced emf is e = -dΦ/dt for one turn and e = -N

The direction of induced emf

The direction of induced emf or current is such that it opposes the cause producing it. This is consistent with conservation of energy because otherwi

If a circuit of resistance R

If a circuit of resistance R is closed, induced current is I = e/R. The induced charge is q = IΔt = (N/R)ΔΦ. Thus induced emf and current depend on th

When a straight conductor of length

When a straight conductor of length l moves with velocity v perpendicular to a magnetic field B, charges experience Lorentz force and an emf V = Bvl i