Electricity study guide

Electricity Study GuideMr. Ball’s 4th Grade

A ____________ is a measure of the extra positive or negative particles that objects have

a. conductorb. chargec. filamentd. electric force

______________ is a charge that is “not moving” and it stays on an object.

a. electric force

b. electric field

c. Conductor

d. static

Only a ____________ charge movesa. Negativeb. positivec. Neutrald. hot

An electric ___________ is the push or pull between objects with different charges

a. Forceb. Currentc. Fieldd. Cell

A material through which an electric charge can move easily is a ___________.

a. Resistorb. insulatorc. filamentd. conductor

Which of these materials is a conductor? a. rubberb. Goldc. Chalkd. glass

Which material would be the best insulator for a metal wire? a. Silverb. Glassc. Graphited. copper

What is one use for an insulator? a. It slows down the flow of electric current

to produce heat and light.

b. It stores electric energy for later use.

c. It allows electric current to flow through it.

d. It makes electrically charged objects safe to handle.

How are conductors and insulators different?

a. Electric charge moves easily through insulators. It does not move through conductors.

b. Electric charge is stronger in an insulator.c. Electric charge is weak in a conductor but

strong in an insulator.d. Electric charge moves easily through a

conductor. It does not move through insulators.

An electric ___________ is the space where electric forces occur around an object

a. forceb. currentc. fieldd. cell

Which statement best describes what will happen in a closed circuit? a The flow of electric current will stop

when the light goes on.b Electric current will flow one time

through the circuit.c Electric current will flow until the circuit

is broken.d Electric current will not flow in the

circuit.

Electric current cannot flow in a series circuit if ______________.a the circuit contains an insulator

b the circuit contains a resistor

c there is a break in the circuit

d the circuit has only one loop

What will happen in a parallel circuit if one of its loops is broken? a. electric current will not flow through any of the

loops

b. electric current will still flow through the broken loop

c. electric current will still flow through the unbroken loops

d. the energy source will stop providing energy to move electric charges

A washing machine is an example of transforming ________a electricity into motion energy

b electricity into light

c motion energy into electric energy

d heat into motion energy

Five light bulbs are wired on one circuit. Three bulbs are lit, two are not. What type of circuit is this?

a. series circuit

b. open circuit

c. parallel circuit

d. closed circuit

A filament is a thin, coiled wire in a lightbulb that gets so hot it glows and gives off light. Therefore, a filament is a __________a insulator

b switch

c battery

d resistor

Which of the following uses resistors to transform electricity into heat?

a. a toaster

b. a fan

c. a gas oven

d. a computer

What will happen to this circuit if a rubber eraser is placed between the battery and one of the wires connect to it?a. The eraser will act as an insulator and

stop the electric current.b. The eraser will act as a conductor and

allow the current to continue.c. Nothing will happen.d. The eraser will become the resistor in

the circuit.

Why do you get a shock sometimes when you touch a door handle.

•An electric charge (static) is built up on your body as you walk on the carpet. When you touch the door handle the static is discharged to the knob sometimes giving you a small shock

Give three examples of how one type of energy can be changed (transformed) into a different type of energy.

•A wind turbine changes wind energy into electrical energy

•A toaster changes electrical energy into heat energy

•A solar panel changes solar energy into electrical energy

•A washing machine changes electrical energy into motion energy

•Answers will vary. Think of your own