A student investigates how the number of turns on a coil affects the maximum potential difference induced across it.
The student drops a bar magnet from the same height through each coil. A datalogger records the maximum potential difference.
The Table shows the results.
Table
| Number of turns on the coil | Maximum potential difference / mV\text{mV}mV |
|---|---|
| 100 | 14 |
| 200 | 27 |
| 300 | 42 |
| 400 | 55 |
| 500 | 70 |
Describe the relationship between the number of turns on the coil and the maximum potential difference.
Use data from the Table in your answer.
Predict the maximum potential difference for a coil with 250 turns.
Explain why the student drops the magnet from the same height each time.
The student repeats the experiment with the 300 turn coil using a stronger magnet. The magnet is dropped from the same height.
Predict the maximum potential difference.
Give a reason for your answer.
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.