Question

what is the formula for induced emf ?​

Answer 1

Answer:

Faraday's law states: Induced EMF is equal to the rate of change of magnetic flux. Magnetic flux = Magnetic field strength x Area = BA. Therefore...Induced EMF = (change in Magnetic Flux Density x Area)/change in Time. Therefore, Induced EMF = (Bπr2n)/t.

Explanation:

Answer 2

The formula for induced EMF is:

Explanation:

• Electromotive force (EMF): According to Faraday's Law, the voltage is generated by a battery or magnetic force. It is not a force because it is measured in volts rather than newtons. (the formula is attached)
• The minus sign in Faraday's law indicates that the EMF produces a current I and a magnetic field B that opposes the flux change. This is known as Lenz's law. The essential operating concept of transformers, inductors, and many types of electrical motors, generators, and solenoids is Faraday's law of induction.
• According to Faraday's law, the EMF induced by a change in magnetic flux is proportional to the flux change, time t, and a number of coil turns.