Question 47
HThe Figure shows a graph of the potential difference produced by an alternator.
Figure
a.[1]
Determine the peak potential difference produced by the alternator.
b.[3]
Calculate the frequency of the potential difference.
Use the equation
frequency=1time period\displaystyle \text{frequency} = \frac{1}{\text{time period}}frequency=time period1
c.[2]
The coil of the alternator is made to rotate twice as fast.
Describe two ways the graph would change.
d.[2]
A dynamo with an identical coil and magnet is rotated at the original speed.
Describe how the graph of the potential difference produced by the dynamo would be different from the Figure.
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.