Physical Science Chapter 10 Study Guide

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insulator

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

static

Stationary electricity is also called ________ electricity.

battery

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 ___________ ______.

switch

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

electrons

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

ampere

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 __________ _________.

generator

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 _______ _________.

resistor

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

attracted

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

electroscope

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 _______-________.

ohms

Resistance is measured in units called ________.

fuses

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.

lightning

__________ 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 _________ ______.

coulomb

The SI unit for electrical charge is the _________.

repel

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

volt

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 ___________ __________.

capacitors

Modern charge-storing devices are called __________.

conductors

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

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