Chapter 20 Electricity

Front

What is an insulator?

Back

An insulator is a material that does not allow electric charges to flow freely. Example: wood.

Front

How much energy does a 100-W light bulb use in 8.0 hours?

Back

0.80 kWh.

Front

What is the continuous flow of electric charges through a material called?

Back

Electric Current.

Front

What resistance is needed to cause a 20A current flow because of a 100V battery?

Back

5Ω.

Front

What are the two types of circuits?

Back

Series and parallel.

Front

Define Electric Current.

Back

Electric Current is the rate at which electric charges flow through a conductor.

Front

What is the unit of electric current?

Back

Ampere (A).

Front

What is Ohm's Law?

Back

Ohm's Law states that the current through a conductor between two points is directly proportional to the voltage across the two points.

Front

What is the formula for calculating resistance?

Back

Resistance (R) = Voltage (V) / Current (I).

Front

What is a series circuit?

Back

A series circuit is a circuit in which the components are connected end-to-end, so that the current flows through each component in turn.