The area around a magnet where magnetic forces act is called the ......................
magnetic field.
When electric current stops flowing in an electromagnet, the magnetic field ________.
disappears
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
define electric current
continuous flow of charge
difference in electric potential energy per charge is called
voltage
Objects become negatively charged when they ________ electrons
gain
In an electric motor, electric energy changes into ________ energy.
mechanical or kinetic
The magnetic field is strongest at the ....................of a magnet.
poles - ends
Like charges attract each other. t or f
false
In electric force, the greater the amount of charge, the ________ the force.
stronger
What is an Aurora?
are glowing displays in the night sky happens when energetic electrically charged particles travel along the magnetic field lines and collide with gas atoms in
Explain one way to make an electromagnet stronger.
You can increase the number of wire coils or increase the electric current.
mention the 4 methods of charging an object
conduction - friction - induction - polarization
what happens to the potential energy when you pull two opposite charges away from each other
increases
is a material that allows electric charges to move easily through it.
conductor
Define electromagnet.
solenoid with a ferromagnetic core
Define insulator.
An insulator is a material that resists the flow of electric charges.
define Static electricity
Static electricity is the buildup of electric charge on an object.
An electric current can produce a magnetic field. t or f
true
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