Magnet Mastery QuizVersion en ligne Grade 7 magnet and electromagnet basics par Lucy Mtyatyeni 1 What is a magnet? a A material that can attract iron and some metals b A device that generates light c A type of chemical reaction d A material that dissolves in water 2 Which part of a magnet is strongest? a The center b The tips of the poles only c The poles (north and south) d The edges 3 Which materials are attracted to magnets? a Copper, aluminum, zinc b Glass, plastic, wood c Iron, nickel, and cobalt d Silk, wool, cotton 4 What is electromagnetism? a Magnetism that occurs in non-metallic substances b Magnetism from static electricity only c Magnetism produced by an electric current d Magnetism caused by gravity 5 How can an electromagnet be turned off? a Break or remove the electric current b Increase the current continuously c Spin the coil rapidly d Coat with butter 6 Which factor strengthens an electromagnet? a Using non-conductive material for the coil b Increasing the number of coils and current c Decreasing the core mass d Removing all metal from the circuit 7 The shape of a magnet's field is strongest near: a The center b The poles c Equally everywhere d The outer surface only 8 What happens to a current in a wire around a magnet? a It creates a magnetic field that can attract or repel b It stops all magnetic fields nearby c It instantly dissolves the magnet d It has no effect on magnetism 9 Which device uses electromagnets to work? a Solar panels b Non-magnetic rulers c Thermometers d Electric doorbells 10 A temporary magnet is formed when: a A magnet is hammered gently b An electric current magnetizes a core c A magnet is cooled below 0°C d A magnet is painted red
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