Ch. 20 study guide

One example of a good conductor is a - copper b-wood see - glass D - rubber

Copper

Normally, Adams our electricity mutual because they are , A-more protons and electrons B-more electrons than protons C-equal numbers of protons and neutrons D-equal numbers of protons and electrons

Equal numbers of protons and electrons

True or false? Batteries are the only devices that separate positive and negative charges to create a continuous electric current

False

True or false? Electrons move freely through an insulator

False

True or false? The rule of electric charges can be stated as like charges attract and unlike charges repel

False

An electric field get stronger as you a - get closer to a charge B - get further from a charge C - add electrons to a positively charged object D - remove transfrom a negatively charged object

Get closer to a charge

The filament in a lightbulb is often made of tungsten wire because tungsten is a a - good conductor and has a high resistance b-A good conductor and has low resistance C - insulator that has a high resistance D - good insulator and has a low resistance

Good conductor and has a high resistance

A material through which electrons do not readily flow is a A - conductor b - fuse C - insulator D - transformer

Insulator

In a battery, electrons clove from a - pot one positive terminal to the other positive terminal B - the positive terminal to the negative terminal C - negative terminal to the positive terminal D - one negative terminal to the other negative terminal

Negative terminal to the positive terminal

Resistance is measured in units called B a - ampere B - watt C - OHM D - volt

OHM

A series circuit is a circuit with blank paths for the electric current to follow A - no B - 1 C- more than one D-infinite

One

Two objects will check it when other one they have a- light charges B - opposite charges C- the same amount of chard D-no charge

Opposite charge

Which of the following is incorrect relationship among the power, current and voltage? A-P=I/V B-V=P•I C-P=I•V D-V=I/R

P=I•V

A circuit that has two or more separate pass for electrons to flow is they a - circuit breaker B - electrons are good c - parallel circuit d - series circuit

Parallel circuit

Blank is an example of a good electrical insulator a - aluminum foil B - copper C - copper D - rubber

Rubber

Path created for a current that flows only one route for the current is called a a - parallel circuit B - parallel current C-series circuit D - series current

Series circuit

We walk across a carpeted floor and then touch a panel door knob, the shock you may feel occurs because Of an A- Static discharge b-electrical field C - Static charge D - chemical reaction

Static discharge

True or false? A series circuit has more than one path for the electric current to flow

True

True or false? A watt is the amount of power used when a current of 1 A flows through a circuit with a voltage of 1 V

True

True or false? Electrical current generally increases as voltage increases

True

True or false? Houses, schools, and other buildings are wired using parallel circuits

True

True or false? Materials have electric resistance because electrons collide with atoms in materials, which releases thermal energy and light

True

True or false? The amount of electrical energy lost as heat and light increases as the resistance decreases

True

True or false? The human body is a conductor

True

True or false? The rapid movement of excess electrons from one place to another is an electric discharge

True

True or false? Two types of electric charges exist, positive and negative

True