A student wants to magnetise an unmagnetised steel bar.
The student proposes three different methods:
I. Place the steel bar inside a long coil (solenoid) carrying a steady direct current (d.c.).
II. Stroke the steel bar repeatedly in one direction with the north pole of a strong permanent magnet.
III. Place the steel bar inside a long coil (solenoid) carrying an alternating current (a.c.) and slowly withdraw it.
Which of these methods will successfully magnetise the steel bar?
I and II only
I and III only
II and III only
I, II, and III
169 exam-style questions on CIE IGCSE Physics Simple phenomena of magnetism, covering Simple phenomena of magnetism. Each one has a worked solution and a mark scheme showing where the marks go.