Electricity Review Quiz

The charge of an electron is

• Electrons have no charge

• positive

• negative

Two like charges

• must be neutrons

• attract each other

• repel each other

• have no effect on each other

Electrical forces between charges are strongest when the charges are

• close together

• the electrical force is constant everywhere

• far apart

Coulomb's law says that the force between any two charges depends

• inversely on the square of the distance between the charges

• directly on the size of the charges

• all of the above

• none of the above

Two charges are separated by a certain distance. If the magnitude of each charge is doubled, the force on each charge is

• halved

• doubled

• tripled

• quadrupled

When the distance between two charges is halved, the electrical force between the charges

• doubles

• halves

• reduces to one fourth

• quadruples

The SI unit of charge is the

• ohm

• newton

• ampere

• joule

• coulomb

Compared to thin wires, electrical resistance in thick wires is

• greater

• the same

• less

A woman's hair stands out when she is in contact with a charged Van de Graaf generator. The reason her hair stands out is because

• like charges repel

• she is in a strong electric field

• hair is a good conductor

• hair strands are at a high voltage

The current through a 10-ohm resistor connected to a 130-V power supply is

• 10 A

• 13 A

• 1.3 A

• 130 A