A student has a metal bar and wants to determine whether it is a permanent magnet. They bring a known permanent bar magnet near to each end of the metal bar in turn.
Which observation provides definitive proof that the metal bar is a permanent magnet?
One end of the metal bar is attracted to the North pole of the known magnet.
One end of the metal bar is repelled by the North pole of the known magnet.
Both ends of the metal bar are attracted to the North pole of the known magnet.
Both ends of the metal bar are attracted to the South pole of the known magnet.
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.