An electromagnetic buzzer contains an electromagnet and a vibrating iron reed.
Which of the following changes would increase the magnetic field strength of the electromagnet?
The iron reed of the buzzer vibrates with a frequency of 12.5 Hz12.5\text{ Hz}12.5 Hz. Calculate the period of the vibration of the iron reed. Use the equation: period=1frequency\text{period} = \frac{1}{\text{frequency}}period=frequency1
Practise AQA GCSE Physics The motor effect with exam-style questions for Foundation and Higher tier. 25 questions covering Electromagnetism, Fleming's left-hand rule (HT only), Electric motors (HT only), and Loudspeakers (physics only) (HT only), matched to the AQA GCSE Physics (8463) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.