Free Printable Nature electricity & Electrical variables

Worksheets

Nature electricity & Electrical variables

Total questions: 20

Worksheet time: 12mins

Name

Class

Date

A toaster, rated 1500 W 240 V, is switched on for 15 minutes. Calculate the energy used.

3600 J

22 500 J

216 000 J

1 350 000 J

A fan, rated 50 W 240 V, uses 90 000 J of electrical energy. How long was the fan switched on?

Hint: Find the time.

1800 h

1800 s

375 s

375 h

A 0.40 kW lamp was turned on for 8 hours.

What is the electrical energy in kWh consumed by the lamp?

(a)

A particle that carries a negative electric charge is called a(n) ______.

neutron

atom

proton

electron

The potential difference that causes charges to move in a circuit is ___.

voltage

resistance

current

electric discharge

A neutral object becomes negatively charged when it loses electrons.

true

false

A student wants to use the diagram below to explain what happens when the light bulb turns on. How could she best explain what is happening?

Light energy is transformed to electric energy.

Electric energy is transformed to light energy.

Electric energy is transformed to motion energy.

Motion energy is transformed to electric energy.

Tasha tested several items to see if they could conduct electricity. Her data is shown below. What is the best claim she could make from her data?

Wood is an insulator.

Metal is an insulator.

Keys are insulators.

Toothpicks are conductors.

Would these magnets repel or attract?

Repel

Attract

10.

The flow of electricity in a circuit-

current

flow

circuit

11.

The plastic around the wire is

conductor

insulator

decoration

12.

This picture shows a circuit that is

closed

open

an insulator

static electricity

13.

True or False
If you hear thunder, lightning is close enough to strike you.

False

True

14.

An object that has more electrons than protons would have what kind of charge?

Positive

Negative

15.

Magnetism produced by an electric current

battery

electromagnetism

open circuit

closed circuit

16.

Charge per unit time is

potential difference

continuity

electrical current

resistance

17.

1 Coulomb is equal to

6.25 x 10¹⁶ electron

6.25 x 10¹⁷ electron

6.25 x 10¹⁸ electron

6.25 x 10¹⁹ electron

18.

Find the output voltage of a battery that use up 5 Joules of energy in moving 0.5 Coulomb of charges

10 Volts

15 Volts

20 Volts

25 Volts

19.

What is the conductance of a 5 kOhm resistance?

0.0005 S

0.0004 S

0.0003 S

0.0002 S

20.

The flow of electron is from

positive to negative polarity

negative to positive polarity

positive to positive polarity

negative to negative polarity

Reset

Nature electricity & Electrical variables

Total questions: 20

Worksheet time: 12mins

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