A loop of wire is moved into a magnetic field at a constant speed. What happens to the induced EMF as it enters the field?
Correct Answer: Induced EMF increases.
- Step 1: Understand that a loop of wire is being moved into a magnetic field.
- Step 2: Know that when the loop enters the magnetic field, it starts to experience a magnetic force.
- Step 3: Remember that magnetic flux is the amount of magnetic field passing through the loop.
- Step 4: As the loop moves into the magnetic field, more of the loop is inside the field, which increases the magnetic flux.
- Step 5: The change in magnetic flux over time is what induces an electromotive force (EMF) in the loop.
- Step 6: Since the loop is moving at a constant speed, the rate of change of magnetic flux increases as it enters the field.
- Step 7: Therefore, as the loop enters the magnetic field, the induced EMF increases.
- Electromagnetic Induction – The process by which a changing magnetic field within a closed loop induces an electromotive force (EMF) in the wire.
- Faraday's Law of Induction – The induced EMF in a circuit is directly proportional to the rate of change of magnetic flux through the circuit.
- Magnetic Flux – The product of the magnetic field strength and the area through which it passes, affecting the induced EMF.
