Exam 2: Electricity

A popular test instrument used to measure voltage, current, or resistance is a(n)

What is produced when light strikes some materials and electrons are emitted?

The unit for conductance is the siemens.

A charge in motion is an electric current.

Semiconductors have five electrons in the outermost ring.

All the materials we know, including solids, liquids, and gases, contain two basic particles of electric charge:

Conductors have very few free electrons.

The practical unit for conductance is the ______________.

The basic unit of charge is the

We depend on electricity for lighting, heating, air conditioning, phones, appliances, and computers.

Which of the following is not an insulator?

Potential refers to the rate of doing work.

An electron is the smallest amount of electric charge having the characteristic called negative ______________.

An open circuit is considered to be

A battery is a device that converts electrical energy into chemical energy.

A higher value of conductance corresponds to a lower value of resistance.

The volt is a measure of the amount of work or energy needed to move an electric charge.

A motion of positive charges is considered ______________ current.

If a material has very few free electrons, it is a(n)