Question 9
HA student drops a bar magnet, north pole first, through a short coil of wire. The coil is connected to a datalogger.
The Figure shows how the potential difference across the coil changes as the magnet falls through the coil.
Figure
a.[2]
Explain why there is a potential difference across the coil as the magnet falls into the coil.
b.[2]
Explain why the potential difference is negative as the magnet leaves the coil.
c.[2]
Explain why the negative peak is larger than the positive peak.
d.[1]
Explain why the negative peak lasts for a shorter time than the positive peak.
e.[2]
The student drops the magnet from a greater height above the coil.
Predict two changes to the shape of the graph.
13.1 Inducing a current Questions
92 exam-style questions on Edexcel GCSE Physics 13.1 Inducing a current, covering 13.1.1 Producing an electric current by induction, 13.1.2 Factors affecting the induced potential difference, 13.1.3 Alternators and dynamos, and 13.1.4 Microphones and loudspeakers. Each one has a worked solution and a mark scheme showing where the marks go.