Electricity and Magnetism

The unit of measurement for _____ is the ohm.

• voltage

• current

• resistance

• electrical power

Homes built today are wired in...

• parallel circuits

• series circuits

• two-way circuits

• non-conductive series pathways

The increase or decrease in voltage moves through a device called a:

• commutator

• motor

• generator

• transformer

Materials through which electricity flows easily are known as:

• semiconductors

• actuator

• insulator

• conductor

Current that reverses direction in a regular way is called:

• direct current

• magnetic current

• circuit current

• alternating current

The voltage in the outlets in your home is:

• 120 Hz

• 60 V

• 120 V

• 60 Hz

Dry cell batteries produces....

• alternating current

• the same current as a generator

• open ciruit

• direct current

Materials that are poor conductors of electricity are called:

• resistors

• conductors

• insulators

• absorbers

Alternating current (AC) and direct current (DC) are different in:

• amount of charge flowing

• direction of charge flow

• kind of charge flow

• amount of energy per unit of charge

Which of the following will conduct electricity the best. (more than one answer may be chosen)

• metal pot

• plastic fork

• ceramic coffee mug

• copper wire