Static Electricity
Electric Currents
Magnets
Electromagnets
Everything
100
What do you call the measure of extra positive or negative particles that an object has?
A charge
100
How is an electric current different from static electricity?
Electric current flows (moves), while static electricity does not.
100
What is a magnet?
An object that attracts certain materials, usually iron or steel.
100
When does a wire produced a magnetic field?
When an electric current is given to it.
100
What name would you give to the rubber or plastic that covers metal wires in the cords you use for all your electronic appliances?
An insulator.
200
What does the word "static" in Static Electricity mean?
Not Moving
200
What do you call a path that is made for an electric current?
A circuit.
200
Where on a magnet is the magnetic pull the strongest?
At its poles (north and south).
200
How would you make an electromagnet?
1. coil a wire around a metal core 2. give the wire an electric current
200
Give one example of how electricity and magnetism are alike.
1. They produce a field that pushes and pulls OR 2. They have opposite states (positive-negative, North-south) OR 3. Opposites attract, same repels
300
What word would you use to describe an object that has about as many positive charges as negative charges?
Neutral
300
In an electric circuit, what name would you give the battery?
The electric cell.
300
What is a magnetic field?
The space all around a magnet where the force of the magnet can act.
300
Why is an electromagnet a temporary magnet?
Because the electric current can be turned on and off. When it's off, it's not a magnet anymore.
300
What do you call a material that resists, but doesn't stop the flow of an electric current?
A resistor.
400
What is an electric field?
The space where electric forces occur around an object.
400
What type of material would be a good conductor for electricity?
Most metals
400
What direction will the compass point if you place a bar magnet near to it?
Towards the bar magnet.
400
How can you make an electromagnet stronger?
wrap more loops around its core OR increase the electric current
400
What will happen to a compass if you put it next to an electromagnet that is turned on?
The compass needle will move (and line up with magnetic field).
500
What would happen if you brought two balloons with negative charges near to each other?
They would repel, or push away from, each other.
500
What is the difference between a series circuit and a parallel circuit?
A series circuit only has one path, and a parallel circuit has more than one.
500
Why does a compass always point North?
Because the compass magnet is acted on by the earth's magnetic field and it forces the compass magnet to line up with the North and South Poles.
500
What is the main difference between a bar magnet and an electromagnet?
A bar magnet can't be switched on and off; an electromagnet is temporary - it can be turned on and off.
500
If one light bulb is removed from a turned on parallel circuit, what will happen to the other bulbs in the circuit?
Nothing (they will stay lit up)
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