Question Constellation Sign up for free AQA · GCSE · Physics · Higher
Demonstrating the Generator Effect
Figure 13 shows a wire held between two magnets. The wire forms part of a closed circuit connected to an ammeter.
The teacher moved the wire upwards between the magnets. The needle on the ammeter deflected to a value of +0.4 mA and then returned to zero.
What effect did this demonstrate?
Write your answer first. You can study the marking guidance whenever you need it.
Study the marking See what earns credit and compare it with a full-mark answer.
Marking points
- 1 Identifies the generator effect or electromagnetic induction.
Full-mark answer
The generator effect (electromagnetic induction).
Why this answer loses marks
Calls the demonstration the motor effect.
The motor effect uses current to produce force; here motion in a magnetic field produces an electrical response.