Question

What does Faraday’s First Law or Neumann’s law state about the magnitude of induced emf?

Options

• It is zero whenever magnetic flux changes.

• It is equal to the negative rate of change of magnetic flux.

• It is equal to the constant magnetic flux through the circuit.

• It depends only on the resistance of the circuit.

Answer 1

When magnetic flux through a circuit changes, an induced emf is set up. Neumann’s law relates that emf to the negative rate of change of magnetic flux.