magnetism and electromagnetismOnline version Basic tutorial about electromagnetism by Juan Campos 1 What kind of materials can a magnet attract? Selecciona una o varias respuestas a copper wire b wood c clips and screws d coins 2 A magnetic bar has two poles. What answers are true? Selecciona una o varias respuestas a two poles of the same type attract b two poles of different types repel c two poles of the same type repel d two poles of different types attract 3 Where does the magnetic field lines go in a magnet bar? a from south to north b from north to south c from west to east d from east to west 4 When does a wire produce a magnetic field? Selecciona una o varias respuestas a never produces a magnetic field b when it approaches the battery c when an electric current flows through the cable d always produces an electromagnetic field 5 What types of devices use electromagnetism for their operation? Selecciona una o varias respuestas a chairs, armchairs and stools b skates, rackets and balls c spoons, forks and knives d motors, doorbell and speakers Explicación 2 3 4 5
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