Static Electricity
What kinds of charged particles can move between objects that are close together?
Negative particles
What is an electric current?
An electric charge in motion
Name an object that transforms electrical energy into sound energy.
ex:) radio, TV
What is the structure of a magnet?
A magnet has a north-seeking pole and a south-seeking pole at opposite ends. The magnetic fields are strongest at the poles.
What is an electromagnet?
A magnet that only works when electricity is provided
What is static electricity?
open
What part of a toaster is a resistor?
The curls inside the slots
The magnets repel each other.
What are two reasons that electromagnets are useful?
Same charge - push away / repel
Opposite charges - pull toward / attract
What types of materials are good conductors? (examples)
metals (copper, gold, silver), pencil lead
What is necessary for electricity to be transferred?
A resistor
How are the poles of a magnet different from other parts of the magnet?
The magnetic force is stronger at the poles than from the other parts.
What is a generator?
A machine that produces electric energy by turning coils of wire around powerful magnets
What is an electric force?
What types of materials are good insulators? (examples)
Plastic, rubber, glass, dry wood
What is a filament?
A thin, coiled wire that can get very hot without melting
The compass needle is a magnet and responds to Earth's magnetic field. It points toward Earth's magnetic north pole.
An electromagnet uses electricity to produce magnetism. A generator uses magnetism to produce electricity.
What happens after positive particles on the ground attract negative charges built up near the bottom of a cloud?
The static electricity from the cloud is released, the moving particles heat up the air, and the air glows as lightning.
Energy source - provides energy to move electric charges
Wires - provide path for current to flow
Resistors - transform electrical energy into other forms
Switch - opens and closes circuit
What is the cause of electricity being changed into light in a filament?
The filament becomes so hot that it glows, giving off light.
What do like poles do? Unlike poles?
Like - repel
Unlike - attract
How does electric current produce magnetism?
Electric current flowing through wire produces a magnetic field around the wire.