Which statement correctly describes the main function of an electromagnetic relay in an electrical circuit?
It converts alternating current into direct current.
It uses a small current in one circuit to safely switch on or off a larger current in a separate circuit.
It increases the voltage of an electrical supply while decreasing the current.
It automatically decreases its resistance when the temperature of the surroundings rises.
67 exam-style questions on CIE IGCSE Physics 4.3.3 Action and use of circuit components. Each one has a worked solution and a mark scheme showing where the marks go.