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Faraday's Law Calculator

Physics
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Calculates the induced electromotive force (EMF) in a circuit based on Faraday's Law of Induction. This law states that the EMF is proportional to the rate of change of magnetic flux through a circuit.

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How To Use

How to use this calculator

Start with your values, or try a preset.

Step 1

Enter Number of Turns in the Coil, Change in Magnetic Flux (Wb), and Time Over Which Flux Changes (s) in the units shown.

Step 2

Read Induced Electromotive Force (EMF) (V) in the results panel. Results update as you change the inputs.

Step 3

Choose a preset to load an example, then adjust the values for your situation.

Worked Examples

Example calculations

See the inputs and their calculated results.

Example 1

Number of Turns in the Coil: 100; Change in Magnetic Flux (Wb): 0.01 Wb; Time Over Which Flux Changes (s): 0.1 s

Induced Electromotive Force (EMF) (V): -10 V

Example 2

Number of Turns in the Coil: 500; Change in Magnetic Flux (Wb): 0.05 Wb; Time Over Which Flux Changes (s): 0.5 s

Induced Electromotive Force (EMF) (V): -50 V

Example 3

Number of Turns in the Coil: 200; Change in Magnetic Flux (Wb): 0.02 Wb; Time Over Which Flux Changes (s): 0.2 s

Induced Electromotive Force (EMF) (V): -20 V

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