A is a circuit with only one loop

A_____ is a circuit with only one loop for current to follow. • Series circuit

An accumulation of excess electric charge is ____. • Static electricity

What is voltage difference? • The electric force that makes current flow in a circuit

According to ___, electric charge cannot be created or destroyed • Law of conservation of charge

What type of substance makes the best conductor? • Metals

Resistance in wires causes electrical energy to be converted into which form of energy? • Thermal energy

What happens to the electric force if the distance between two electric charges is increased? • Force becomes weaker

A commonly used unit for electrical energy is ___ • Kilowatt hour k. Wh

Like charges ____; opposite charges _____ • Repel; attract

The SI unit for current is the ____ • ampere

An ___ surrounds every electric charge and exerts a force that causes other charges to be attracted or repelled. • Electric field

____is a transfer of charge between two objects because of buildup of static electricity • Static discharge

Connecting an object to earth with a conductor is called _____ • Grounding

A device that can detect the presence of an electric charge is called an ____ • Electroscope

The net movement of electric charge in a single direction is an _____ • electric current

_____is the tendency for a material to oppose the flow of electrons • Resistance

The rearrangement of electrons on a neutral object caused by a nearby charged object is called ___ • Charging by induction

Which is stronger between a proton and an electron— gravitational force or electric force? • Electric force

The SI unit for voltage difference is ___ • Volts v

A material in which electrons are able to move easily is a ____ • conductor

A material in which electrons are not able to move easily is an ____ because the electrons are held tightly to the atoms. • Insulator

An example of a large discharge of static electricity is ____ • lightning

What prevents damage from lightning? • Grounding

6. 25 x 1018 electrons is equal to one ___ • amp

When current flows what caused the net movement of electric charges? • Electric force

Electric charge flows from ____ voltage to ___ voltage. • Higher; lower

A closed path that electric current follows is a(n) ____ • circuit

The units for measuring resistance are ____ • ohms

What object have greater resistance: metals or nonmetals? • nonmetals

Name three things that will cause the resistance in an object to increase. • Longer wire • Thinner wire • Increase the temperature of the wire

If you decrease the resistance and increase the voltage difference in a circuit, what will happen to the current? • The current will increase

The relationship between voltage difference, current, and resistance in a circuit is known as ____ • Ohm’s law

_____ circuits contains two or more branches for current to move thru. • Parallel

Household circuits: series or parallel? • parallel What type of voltage? 120 v and 240 v

What is the purpose of a fuse box or circuit breakers? • Prevent overheating

A ____has a small piece of metal in it that melts if the current becomes too high breaking the circuit. • fuse

A_____ contains a piece of metal that bends when the current is too high causing the switch to flip to the off position. • Circuit breaker

The rate at which electrical energy is converted to another form of energy is the ____ • Electric power

In Ohms Law, the letter I represents ____ • current

What is used to maintain voltage difference in a circuit? • battery

What is the difference between a dry cell battery and a wet cell battery? • Type of electrolyte