Which statement correctly describes a similarity between a permanent bar magnet and an electromagnet?
The magnetic field strength of both can be easily varied by changing the electric current.
Both are surrounded by a magnetic field that is strongest near their magnetic poles.
Both are typically constructed using a magnetically hard steel core to function effectively.
Both maintain their magnetism permanently when stored without any connection to a power source.
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.