Share Magnetism and Electricity
Save to Folder
A magnet that forms when electric current flows through a wire that is wrapped around a piece of metal is called an _________________.
poles
electromagnet
magnetic field
Objects with the same kind of electric charge __________ each other.
repel
electromagnet
attract
A magnet's magnetism is strongest at the __________.
poles
electromagnet
repel
The pushing or pulling force caused by a magnet is called ______________.
poles
magnetism
attract
The area around a magnet where the force of the magnet can act is called the ________________.
magnetic field
electromagnet
repel
True or False: The magnetism of a BAR MAGNET is temporary because it has a switch that turns electric current on and off.
False
True
The only electric charge that can move from object to object is a POSITIVE charge.
False
True
An ELECTROMAGNET can be made stronger by increasing the electric current flowing through the electromagnet's wire.
True
False
In CURRENT electricity, the negative charges have a continuous flow through a material.
True
False
The invisible magnetic field can be observed by sprinkling ____________ around the magnet.
iron fillings
pieces of plastic
bits of paper
A form of energy that involves the flow of electric charges is called ___________.
an insulator
magnetism
electricity
All matter is made up of tiny particles that have electric charges. The tiny particles are called _______.
conductors
circuits
atoms
An object that attracts certain metals is called ________________.
a magnet
a circuit
an insulator
When electric charges build up on the surface of an object, ___________ occurs.
current electricity
static electricity
a circuit
A material that allows electricity to flow through it easily is called ________.
a conductor
an insulator
a circuit
How have electromagnets helped people solve real life problems? (Tell at least two ways in two complete sentences)
Electromagnets are used in fire alarms, toasters, microwaves, doorbells, TV's, computers, trains, and MRI machines.
