magnetism and electromagnetism


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

magnetism and electromagnetismOnline version

Basic tutorial about electromagnetism

copper wire

wood

clips and screws

coins

two poles of the same type attract

two poles of different types repel

two poles of the same type repel

two poles of different types attract

from south to north

from north to south

from west to east

from east to west

never produces a magnetic field

when it approaches the battery

when an electric current flows through the cable

always produces an electromagnetic field

chairs, armchairs and stools

skates, rackets and balls

spoons, forks and knives

motors, doorbell and speakers