A student investigates the magnetic effect of a current in a solenoid with a core. The student makes four different solenoids, each carrying the same electrical current: Solenoid P (50 turns, plastic core), Solenoid Q (50 turns, iron core), Solenoid R (150 turns, plastic core), and Solenoid S (150 turns, iron core).
Which solenoid will have the strongest magnetic field?
17 exam-style questions on OCR GCSE Physics Magnets and magnetic fields. Each one has a worked solution and a mark scheme showing where the marks go.