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10SCI Electricity and Magnetism

Total questions: 111

Worksheet time: 1hrs 29mins

Name
Class
Date
1.
What charge does a proton have?
a)
negative (-)
b)
positive (+)
c)
neutral or no charge (0)
2.
What charge does an electron have?
a)
negative (-)
b)
positive (+)
c)
neutral or no charge (0)
3.
If a substance has a higher number of electrons than protons on its surface, what type of charge does it have?
a)
A positive charge.
b)
A negative charge.
c)
A neutral charge
d)
No charge at all
4.
Which of the following is caused by static electricity?
a)
a stove getting hot when it is turned on
b)
a magnet being attracted to a refrigerator
c)
a lightning strike during a storm
d)
a light bulb coming on when a switch is turned on
5.
An object becomes postiively charged when which of the following occurs?
a)
loses electrons
b)
gains electrons
c)
loses protons
d)
gains neutrons
6.
In a neutral atom, the number of electrons is equal to the number of _______.
a)
Neutrons
b)
Orbits
c)
Protons
d)
subatomic particles
7.
Current is...
a)
moving protons
b)
moving electrons
c)

moving charges

d)

moving energy

8.
current is measured in....
a)
volts
b)
amps
c)
watts
d)
mph
9.
Metals such as copper and aluminum are good ______________. 
a)
insulators
b)
conductors
c)
circuits
d)
charges
10.
The symbol for 1 _____ is A
a)
acceleration
b)
current
c)
ampere
d)
coulomb
11.

Which is NOT a requirement for current to flow?

a)

Complete loop

b)

Connected with conductor

c)

Source of energy

d)

A lightbulb

12.
This is the symbol for a _____?
a)
switch
b)
light 
c)
battery
d)
wires
13.
This is the symbol for a _____?
a)
an AC current source
b)
a DC current source
c)
an ammeter
d)
a voltmeter
14.
This is the symbol for a _____?
a)
an AC current source
b)
a DC current source
c)
an ammeter
d)
a voltmeter
15.
This is the symbol for a _____?
a)
an AC current source
b)
a DC current source
c)
a battery
d)
a single cell
16.

What is the component labelled A?

a)

Battery

b)

Bell

c)

Light bulb

d)

Switch

17.

What is the component labelled B?

a)

Battery

b)

Bell

c)

Light bulb

d)

Switch

18.
This is the symbol for a ...
a)
Wire
b)
Battery
c)
Buzzer
d)
Fuse
19.
This is the circuit symbol for ...
a)
an AC current source
b)
a DC current source
c)
a battery
d)
a single cell
20.
a)
Closed switch
b)
Push switch
c)
Trap door
d)
AC Power supply
21.
This picture is an example of what kind of circuit?
a)
Series
b)
Complete
c)
Broken
d)
Parallel
22.
Which of the following answer choices correctly describes the image? 
a)
Series circuit - Bulbs are lit
b)
Series circuit - Bulbs are off
c)
Parallel circuit - Bulbs are lit
d)
Parallel circuit - Bulbs are off
23.
a)

Cell

b)

Wire

c)

Resistor

d)

Variable Resistor

24.
a)

Motor

b)

Resitor

c)

Ammeter

d)

Variable Resistor

25.

This circuit will..........You Choose

a)

work because everything is connected and the switch is closed

b)

will not work because the battery is the wrong way round

c)

will work as the lamps are in series and the battery is connected

d)

will not work, although it is set up correctly the switch is open

26.
This is the symbol for 
a)
An Ammeter
b)
A Voltmeter
c)
A Meter
d)
A Motor
27.
a)
Closed switch
b)
Push switch
c)
Trap door
d)
AC Power supply
28.

This is the symbol for a...

a)

Light Emitting Diode

b)

Fuse

c)

Fixed Resistor

d)

Variable Resistor

29.

This is the symbol for a...

a)

Motor

b)

Thermistor

c)

Fuse

d)

Battery

30.
Pick the correct sentence.
a)
This circuit will work because it is a closed circuit.
b)
Energy will freely flow in this circuit.
c)
This circuit will not work because there is no energy source.
d)
This circuit will not work because there is no switch.
31.
The picture shows an electrical circuit. This circuit is a series circuit because: 
a)
It has 3 light bulbs.
b)
The same current flows through all three light bulbs.
c)
It uses a single battery.
d)
The electrical current is divided between the three light bulbs.
32.
What will happen if one light bulb is removed from this circuit?
a)
The other bulbs will go out.
b)
The other bulbs will stay on
c)
The other bulbs will get dimmer.
d)
The battery will become stronger.
33.
The current has only has one loop to flow through in this circuit. 
a)
Series Circuit 
b)
Parallel Circuit 
34.
Which of the two circuits would have the brightest bulbs? 
a)
A
b)
B
35.
When you remove a bulb from a three bulb circuit, and the other two bulbs go off, then the bulbs must have been connected in __________.
a)
parallel
b)
series
c)
open
d)
closed
36.
Does this statement best describe a parallel or a series circuit.
 
When more light bulbs are added they all remain bright. 
a)
Parallel circuit
b)
Series circuit
37.
Does this diagram represent a series or parallel circuit?
a)
series circuit
b)
parallel circuit
38.
What kind of circuit is this?
a)
Series
b)
Consecutive
c)
Parallel
d)
Training
39.
What kind of circuit is this?
a)
series
b)
parallel
40.
a)
Series circuit - Bulbs are lit
b)
Series circuit - Bulbs are off
c)
Parallel circuit - Bulbs are lit
d)
Parallel circuit - Bulbs are off
41.
This circuit does not work because…
a)
the bulbs are not connected properly
b)
the single cell is not powerful enough
c)
there is a break in the circuit
d)
there is a short crcuit
42.
a)
closed series
b)
open series
c)
open parallel
d)
closed parallel
43.

What is a Series Circuit?

a)

A circuit with more than one path way for current to flow

b)

A circuit with one path way with one switch.

c)

An electric circuit with a single path for current to flow.

d)

Two circuits with one path way for current to flow

44.

What is a Conductor?

a)

A Parallel circuit

b)

A material that allows heat and electricity to flow through it

c)

The pathway through which electric current (electron) flows.

d)

A series current

45.

What is an Insulator?

a)

A material that allows heat and electricity to flow through it

b)

The pathway through which electric current (electron) flows.

c)

A pathway that prevents electric current from flowing freely or stops the flow - light is off!

d)

A material that stops heat and electric current from flowing

46.

What is Voltage?

a)

The energy available to move charges through a circuit

b)

A material that allows heat and electricity to flow through it

c)

A material that stops heat and electric current from flowing

d)

Rubber, styrofoam, cotton

47.

What is a Battery?

a)

Rubber, styrofoam, cotton

b)

The energy available to move charges through a circuit

c)

The flow of electrons in a circuit

d)

The device that provides electrical energy

48.

What is Parallel Circuit?

a)

A wire that has a battery and a switch.

b)

A circuit that contains more than one path for current flow.

c)

A circuit that contians one path for current flow

d)

A circuit with a switch

49.

What will be the readings on the ammeters in this picture

a)

A1 + A2 = A3

b)

A2 + A3 = A1

c)

all the same

d)

all different but don't know how

50.

Which is the true statement below

a)

A1 + A2 + A3 = A4

b)

A1 and A2 are the same

c)

all the same

d)

A3 and A4 are the same

e)

A2 + A3 = A1

51.

A current of 6 amps flows for 10 seconds, how much charge has been through?

a)

6

b)

1.66

c)

60

d)

0.6

52.

What does this instrument measure? How should it be connected in a circuit?

a)

This instrument measures current. It should be connected in parallel.

b)

This instrument measures current. It should be connected in series.

c)

This instrument measures voltage. It should be connected in parallel.

d)

This instrument measures voltage. It should be connected in series.

53.

What does this instrument measure? How should it be connected in a circuit?

a)

This instrument measures current. It should be connected in parallel.

b)

This instrument measures current. It should be connected in series.

c)

This instrument measures voltage. It should be connected in parallel.

d)

This instrument measures voltage. It should be connected in series.

54.

In which mode cells are connected in the circuit?

a)

series

b)

parallel

55.
All wires used in electric circuits should be covered with:
a)
a colored material.
b)
a conducting material.
c)
an insulating material.
d)
none of these.
56.
A class prepared some electrical circuits using battery, connecting wires, and three light bulbs.  Which of these circuits can make the three bulbs light?
a)
A
b)
B
c)
C
d)
D
57.

What is missing from this circuit? Why would the light bulbs be off?

a)

The battery, there is no power for the circuit to work.

b)

The switch is open, so the circuit is broken.

c)

The third light bulb, that is needed to complete the circuit.

d)

The wires are not connected properly.

58.
In the picture, if you replace the paper clip with a plastic spoon, what happens? 
a)
The bulb doesn't light
b)
The bulb is dimmer
c)
The wires get hot
d)
There is no charge
59.

The voltage of the entire circuit is 18V. What is the voltage of Lamp B

a)

18V

b)

3V

c)

9V

d)

6V

60.

A battery with voltage of 4V is connected to two identical bulbs the way shown in the diagram. What is the voltage of the second bulb?

a)

1V

b)

2V

c)

3V

d)

4V

61.

Current is the same along the circuit

a)

series circuits

b)

parallel circuits

62.

Total voltage Es = V1 + V2 + ... + Vn

a)

Series

b)

Parallel

63.

Total voltage Es = V1 = V2 =... = Vn

a)

Series

b)

Parallel

64.

Total current Is = I1 = I2 =... = In

a)

Series

b)

Parallel

65.

Total current Is = I1 + I2 +... + In

a)

Series

b)

Parallel

66.

Voltage is the same along all branches

a)

Series

b)

parallel

67.

We measure potential difference with

a)

Ammeter

b)

Ohmmeter

c)

Voltmeter

d)

Power meter

68.

Other words for voltage are

a)

Electromotive force, current

b)

Electromotive force, potential difference

c)

potential difference, resistance

d)

power, potential difference

69.
In the event that someone is being shocked by electricity you would never ________________.
a)
call an adult
b)

call 111

c)
touch them
d)
yell for help
70.
What is the function of the neutral wire?
a)
To carry a high voltage
b)
To complete circuit
c)
It is a safety wire
71.
The fuse in a circuit melts when:
a)
An appliance isn't earthed
b)
Too much current flows
c)
Too much voltage flows
72.
A double insulated appliance does not need:
a)
A fuse
b)
A earth wire
c)
A neutral wire
73.
What's the first thing you should do if someone is shocked electrically?
a)
Use the fire extinguisher
b)
Check for breathing and heartbeat
c)
Turn off the power source
d)
Remove the person from the power source
74.

Found in electrical devices and helps to stop too much current from damaging the device

a)

circuit

b)

current

c)

fuse

75.
Overloading a circuit with too many appliances could cause overheating and fire.  
a)
True
b)
False
76.
It is unsafe for you to work with electricity when you are wet or standing in water.  
a)
True
b)
False
77.

Why are these bird safe?

a)

They are only touching one wire, so the current has nowhere to go

b)

They are touching two different wires, so the current cannot flow to the ground

c)

They are touching a wire and a pole connected to the ground, so the current can only flow to the ground

78.

Why have a third prong on a plug?

a)

The third prong protects you if the neutral or live wires get damaged

b)

The third prong helps the electricity flow to/from the plug

79.

What is the name of the third prong on a three-prong plug?

a)

Earth prong

b)

Live prong (sometimes called hot)

c)

Neutral prong

80.

Earth wires are particularly important if the case of an appliance is made of ______

a)

metal

b)

plastic

c)

wood

d)

rubber

81.

A current is electrically ______ when charges are able to flow directly into Earth.

a)

voltage source

b)

power

c)

series

d)

grounded

e)

static electricity

82.

You want to build a device that can conduct current, but that will be safe if touched by a person. Which of the following pairs of materials could you use?

a)

glass for the conductor and rubber for the insulator

b)

copper for the insulator and silver for the conductor

c)

sand for the conductor and plastic for the insulator

d)

plastic for the insulator and silver for the conductor

83.

What is the term for a reusable safety switch that breaks the circuit when the current gets too high?

a)

third prong

b)

fuse

c)

circuit breaker

d)

short circuit

e)

grounded

84.

Without a fuse or circuit breaker, what might happen in a house with an overloaded electric circuit?

a)

the thin piece of metal would melt, breaking the circuit

b)

the metal band would heat up, disrupting the circuit

c)

a fire would start

d)

the electricity for the house would turn off

85.

What is the difference between a fuse and a circuit breaker?

a)

a fuse can only be used once and a circuit breaker is reusable

b)

a fuse is reusable and a circuit breaker can only be used once

c)

both fuses and circuit breakers can only be used once

d)

both fuses and circuit breakers are reusable

86.
a switch that automatically opens if the current in the circuit is too high
a)
parallel circuit
b)
circuit breaker
c)
series circuit
d)
load
87.

Can magnets interact without touching?

a)

Yes

b)

No

88.

The area of magnetic force around a magnet is known as its _____________.

a)

Magnetic Field

b)

Magnetic Fan Lines

c)

Magnetic Area

d)

Magnetic Location

89.

What will the magnets in the picture do?

a)

Attract

b)

Repel

c)

Neither attract nor repel

d)

Both attract and repel

90.

What will the magnets in the picture do?

a)

Attract each other

b)

Repel each other

c)

Both attract and repel

d)

Neither attract nor repel

91.

Permanent magnets are made out of which materials?

a)

Cobalt, Nickel, and Iron

b)

Copper, Chromium, and Cobalt

c)

Gold, Silver, and Platinum

d)

Copper, Nickel, and Iron

92.

Magnetic fields are strongest _______.

a)

at both poles

b)

at the north pole

c)

at the south pole

d)

between the poles

93.

Magnets are made of tiny sections of magnetic fields that are aligned to produce a larger magnetic field. These are called _____.

a)

magnetic domains

b)

magnetic fields

c)

magnetic sections

d)

electromagnets

94.

Why does a compass needle point north?

a)

because north is up

b)

it lines up with Earth's magnetic field

c)

because of magic

d)

the compass is programmed to do so

95.

Are the magnets in this picture attracting or repelling?

a)

Attracting

b)

Repelling

96.
Earth's magnetic poles are in the same place as the geographic poles.
a)
True
b)
False
97.
How are electromagnets different from magnets?
a)
magnets can be turned on/off
b)
you can turn an electromagnet on/off
c)
magnets are more powerful
d)
magnets have a North and South pole
98.

A coil of wire with a current is called a _______. The two ends of this act like the poles of a magnet. It is a weaker electromagnet.

a)

compass

b)

bar magnet

c)

solenoid

d)

circuit

99.

Animals can detect Earth magnetic field?

a)

True

b)

False

100.

5. Magnetic Field lines....

a)

Go into the N side AND go into the S side

b)

Go out of the S side and into the N side

c)

Go out of the N side AND out of the S side

d)

Go out of the N side and into the S side

101.

The earth's north pole is the magnetic _____________

a)

North

b)

South

c)

East

d)

West

102.

A type of magnet that has temporary magnetic effect when electric current flows through it.


This refer to

a)

Electric

b)

Electronic

c)

Electrostatic

d)

Electromagnet

103.

When number of turns in solenoid increase, electromagnetic strength ...

a)

Increase

b)

Decrease

104.

When more current flows in solenoid, strength of magnetic field ...

a)

Decrease

b)

Increase

105.

Most cores are made of _______.

a)

Iron

b)

Copper

c)

Aluminum

d)

Wood

106.

which one is the strongest eletromagnet?

a)

50 turns on the coil, low current,

copper core

b)

100 turns on the coil,

high current,

iron core

c)

50 turns on the coil, low current,

iron core

d)

100 turns on the coil,

low current,

iron core

107.

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

a)

3600 J

b)

22 500 J

c)

216 000 J

d)

1 350 000 J

108.

The electrical energy used by a fan for 4 minutes is 170 kJ. Calculate the power of this fan in W.

a)

42.5

b)

42500

c)

708

d)

0.708

109.

A television rated 1.2 kW , 240 V is connected to a 240V electricity supply. Calculate curent that flows through the television.

a)

5 A

b)

2.5 A

c)

0.005

d)

1.0 A

110.

An oven rated 750 W, 220 V is switched on for 45 minutes. Calculate the cost of energy that is used by the oven if the cost per 1 unit (kW hr) is 30 cents.

a)

3 cents

b)

17 cents

c)

16875 cents

d)

4 cent

111.

An electric heater is rated 230V, 10 A. Calculate the power of the electric heater in kW.

a)

2300

b)

23

c)

2.3

d)

0.23

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