What is a force that acts on moving electric charge and magnetic materials that are near a magnet.
100
What is produced when a coiled wire is spun around a magnet?
What is electrical energy.
100
What is a generator?
What is a machine that creates electrical energy.
200
What is static electricity?
What is when positive and negative charges are no longer in balance.
200
A loop with no breaks through which electric current can flow is a
What is closed circuit.
200
All magnets have
What is a north-seeking pole and a south-seeking pole.
200
Why does a compass needle point a north-south direction?
What is because the needle reacts to Earth's magnetic poles.
200
What is the role that magnets play in helping generators create electricity?
What is a generator uses mechanical energy to turn coils of wire around powerful magnets.
300
Static means
What is not moving.
300
Describe a series circuit.
What is electric charge can flow in only one path. If one bulb burns out, then it acts like an "off" switch. All devices wired to the circuit share the electric current equally.
300
What are three ways to make an electromagnet more powerful?
What is increase the amount of current in the wire, increase the number of turns of the metal coil, or make the magnetic core larger.
300
Before energy is released as lightning, _______ particles will gather near the bottom of the cloud.
What is negative.
300
What are two sources of energy that generators use to create electricity?
What is wind or falling water.
400
When two objects have the same charge...
What is they repel each other.
400
Describe a parallel circuit.
What is has two or more paths for the electric charge to follow. A break in one part of the circuit does not stop the charge from flowing.
400
Where is a magnetic field the strongest?
What is at the poles.
400
In a doorbell, electromagnets help convert ________ to ________ to _________.
What is electric energy, magnetic energy, mechanical energy.
400
What is the dynamo?
What is a machine invented by Michael Faraday that used magnets to transform motion into an electric current.
500
When two objects have opposite charges...
What is they attract each other.
500
Copper and silver are excellent conductors of electric charge because
What is the atoms become charged easily.
500
What two scientists did many experiments with magnetism and electricity? Which scientist shared his findings with other scientists?
What is Michael Faraday and Joseph Henry. Michael Faraday.
500
What happens to a magnet's poles if a magnet is broken into two parts?
What is each magnet will have its own north- and south-seeking poles. The north-seeking pole will be attracted to the south-seeking pole of the other magnet and it will repel the north-seeking pole of the other magnet.
500
How do most homes and schools get their electricity?