Electricity

Electric companies usually sell electrical energy in units of ____.

kilowatt-hours

An area with excess electrons has a net _____ charge; an area with a deficit of electrons has a net _____ charge.

negative, positive

What is the effect on the current in a simple circuit when both the voltage and the resistance are divided by 2?

no change

A circuit that has two or more branches for electrons to follow is a(n) ____.

parallel circuit

A circuit that has two or more separate paths for electrons to follow is a(n)____.

parallel circuit

A __________ is described as a device with specific resistance and is used to control current.

resistor

A path that allows only one route for an electric current is called a ____.

series circuit

Electric charge that has accumulated on an object is referred to as ____.

static electricity

Which of the following is the correct equation to calculate electrical energy?

E = P × t

The statement that current is equal to the voltage difference divided by the resistance is known as ____.

Ohm's law

Which of the following is the correct relationship among power, current, and voltage?

P = I × V

If two charges are placed near each other, what will happen to the electrostatic force if the distance between them is doubled.

The force would be 1/4 as much.

Electric forces can be either repulsive or attractive, whereas gravitational force is always:

attractive

A _____ is described as a device that converts chemical energy to electric energy.

battery

Which of the following is a device designed to open an overloaded circuit and prevent overheating?

circuit breaker

Charging by _____ charges a neutral body by touching it with a charged body; whereas charging by _____ charges an object without touching it with a charged body.

conduction, induction

One example of a good conductor is __

copper

A/An _____ is described as a closed loop or pathway that allows electric charges to flow

electric circuit

A/An _____ is described as a flow of charged particles.

electric current

Normally, atoms are electrically neutral because there are

equal numbers of protons and electrons