Electricity 1
Inside each atom (but not in the nucleus) is a smaller part called what?
Electrons
Electricity moves from _________ pole of the battery to _________ pole, although the _________ in the metal wire moves in ____________ direction.
Electricity moves from POSITIVE pole of the battery to NEGATIVE pole, although the ELECTRONS in the metal wire moves in OPPOSITE direction.
What are three type of particles that are in an atom?
Protons, neutrons, and electrons.
Which two charges attract each other?
Positive and negative.
Which objects have smallest charge possible?
Protons and electrons
What is an electric current?
The steady flow of free charged particles.
What is a circuit?
A current that moves along a wire or path in a single direction
Two objects charged by contact end up with ________ charge.
SAME
What is an example of a conductor?
Metals (copper, gold, silver, aluminum, steel), graphite, solutions of salts and acids, etc.
What is an example of an insulator? Give at least two examples.
Rubber, glass, plastic, wood, air, etc.
What is a conductor?
A material that current can pass through easily (or with free charged particles in it).
What does the conservation of charge law state?
Electric charge of an isolated system stays the same.
What are the necessary conditions for current to flow?
1) Existence of free charged particles;
2) Existence of electric field;
3) Closed circuit
What is an insulator?
A material that current cannot pass through easily.
Lightning strikes occur when ____________ charges at the ground attract negative charges at the bottom of a storm cloud.
Lightning strikes occur when POSITIVE charges at the ground attract negative charges at the bottom of a storm cloud.
Charging by induction causes the rearrangement of ______________ on a ______________ object caused by a nearby charged object.
Charging by induction causes the rearrangement of ELECTRONS on a NEUTRAL object caused by a nearby charged object.
Charging by friction is when?
Two materials rub together and transfer electrons.