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Rubber makes a great __________________. That is why power lines are coated in rubber.


Stationary electricity is also called ________ electricity.


A __________ consists of one or more electrochemical cells that supply electrons released by a chemical reaction.

wet, dry

There are two types of cells for batteries; a ________ cell and a _________ cell.

circuit breaker

Most houses have between ten and forty circuits protected by ________ _________ switches that automatically trips if too much current flows through it.

lightning rod

A device used to protect buildings from lightning is called a ___________ ______.


A ________ allows you to open or close the circuit by opening or closing a gap in the current path.


An electrical charge is usually produced by the removal or addition of __________.


Electrical current is measured in a unit called the ______________.

kilowatt hours

Electrical energy is dispensed and billed in units called __________-________.

series circuit

When loads are connected one after another on the same path it is called a __________ _________.


A _______ is basically one or more coils of wire rotated in a magnetic field by some form of prime mover such as a motor or tubine powered by steam, water or wind.

direct current

Current that flows in one direction through a conductor is called _______ _________.


A device that can change the voltage within portions of a circuit is called a ____________.


When two objects with opposite charges approach each other, they are ________ to each other.


Charges can be detected with an instrument called an _______________.

like, opposite

The Law of Charges states that _________ charges repel; _________ charges attract.

Ohm's Law

The statement, "In a DC circuit component of resistance, the current through the component is directly proportional to the potential difference applied to the component", is known as _______ _______.

electrical current

Electricity that involves continuously moving charges is called ________ _________.

semi conductors

Materials that allow limited elctron flow or conduct only under certain conditions are called _______-________.


Resistance is measured in units called ________.


Older homes with original wiring may use _______ as a protective device.

parallel circuit

In a ________ ________ the loads are connected in separate branches of the circuit.


__________ strikes on the earth about one hundred times every second.

Laden jar

A ________ ____ is an early device used to store electrical charges.

ground fault circuit interrupter

The rounded third prong on a standard plug is the ______-______-_______ ___________ device.

electrical circuit

The path that the current flows is called the _________ ______.


The SI unit for electrical charge is the _________.


When two objects with the same charge approach each other, the objects _______ from each other.


We measure the potential difference with a unit called the ________.

solar cells

Photovoltaic devices are also called ________ _______.

electrical discharge

The loss of static charge as electrons move to another object is called ___________ __________.


Modern charge-storing devices are called __________.


Wood, glass and rubber are not good ________ of electricity.

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