Share grade 7 electricity and magnetism
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Like charges attract each other. t or f
false
define Static electricity
Static electricity is the buildup of electric charge on an object.
The magnetic field is strongest at the ....................of a magnet.
poles - ends
An electric current can produce a magnetic field. t or f
true
The area around a magnet where magnetic forces act is called the ......................
magnetic field.
Objects become negatively charged when they ________ electrons
gain
is a material that allows electric charges to move easily through it.
conductor
Define insulator.
An insulator is a material that resists the flow of electric charges.
In electric force, the greater the amount of charge, the ________ the force.
stronger
Define electromagnet.
solenoid with a ferromagnetic core
When electric current stops flowing in an electromagnet, the magnetic field ________.
disappears
Explain one way to make an electromagnet stronger.
You can increase the number of wire coils or increase the electric current.
In an electric motor, electric energy changes into ________ energy.
mechanical or kinetic
Define electric field.
An electric field is the space around a charged object where its electric force is exerted on other charges.
define galvanometer
a device that measures small currents
....... is the relation between magnetism and electricity
electromagnetism
