A coil of wire is placed in a changing magnetic field. What phenomenon is observed?
Correct Answer: Electromagnetic induction
- Step 1: Understand that a coil of wire is a loop or series of loops made of conductive material.
- Step 2: Recognize that a magnetic field is an area around a magnet where magnetic forces can be felt.
- Step 3: Learn that a changing magnetic field means the strength or direction of the magnetic field is changing over time.
- Step 4: Know that when the magnetic field around the coil changes, it affects the electrons in the wire.
- Step 5: According to Faraday's law, this change in the magnetic field creates an electromotive force (EMF) in the coil.
- Step 6: The induced EMF can cause an electric current to flow in the coil if the circuit is closed.
- Electromagnetic Induction – The process by which a changing magnetic field generates an electromotive force (EMF) in a conductor.
- Faraday's Law – A principle stating that the induced EMF in a circuit is proportional to the rate of change of the magnetic flux through the circuit.
