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The equation for induced EMF is given by: EMF = -N * ΔΦ/Δt, where EMF is the induced electromotive force, N is the number of turns in the coil, and ΔΦ/Δt is the rate of change of the magnetic flux through the coil.
The induced EMF equation is derived from Faraday's law of electromagnetic induction, which states that the induced EMF is directly proportional to the rate of change of the magnetic flux through a conductor. This is expressed mathematically as EMF = -N * ΔΦ/Δt.
The negative sign in the induced EMF equation indicates the direction of the induced current. It follows Lenz's law, which states that the induced current will flow in a direction that opposes the change in the magnetic flux that caused it.
No, the induced EMF equation only gives the magnitude of the induced electromotive force. To calculate the magnitude of the induced current, the resistance of the circuit must also be taken into account using Ohm's law (I = V/R).
The induced EMF equation is applicable in any situation where there is a changing magnetic flux through a conductor. This includes scenarios such as a moving magnet near a coil, a changing current in a nearby wire, or a changing magnetic field through a conductor.