Faraday's Law Calculator

Find the induced EMF from a changing magnetic flux.

Number of turns

Change in flux (Wb)

Time interval

Induced EMF (V) -100

Formula: EMF = −N·(ΔΦ ÷ Δt)

Step-by-step with your numbers:

1. Values used:

2. Number of turns = 200

3. Change in flux = 0.05 Wb

4. Time interval = 0.1

6. Induced EMF = -100V

Did we solve your problem today?

A changing magnetic flux through a coil induces a voltage — the basis of generators.

The math behind it

EMF = −N·ΔΦ/Δt. The minus sign (Lenz's law) shows the induced current opposes the change.

200 turns, ΔΦ = 0.05 Wb in 0.1 s → −100 V.

What does the negative sign mean?

The induced EMF opposes the flux change that created it.