An aerospace power-distribution transformer is connected to a primary AC voltage of 48 V at a frequency of 400 Hz. The output voltage from the secondary coil is 240 V. The primary coil of the transformer consists of 150 turns150\text{ turns}150 turns.
State Faraday's law of electromagnetic induction.
Calculate the number of turns on the secondary coil.
At one particular instant during operation, the output voltage across the secondary coil is measured to be 180 V. Calculate the change in magnetic flux through the secondary coil over a brief time interval of 1.5 ms, assuming the voltage remains constant at this value during the interval, and state the unit of magnetic flux.
34 exam-style questions on OCR A A Level Physics Electromagnetism, covering Magnetic fields, Motion of charged particles, and Electromagnetism. Each one has a worked solution and a mark scheme showing where the marks go.