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WorksheetsY7 Electricity and Magnetism
Total questions: 50
Worksheet time: 42mins
Name
Class
Date
1.
In a parallel circuit if one light bulb goes OUT; then they ALL go out. TRUE OR FALSE?
a)
TRUE
b)
FALSE
2.
In a Series circuit the more lightbulbs you add the brighter they get
a)
False
b)
True
3.
What is a switch's function in a circuit?
a)
to make the current hotter or colder
b)
turn on and off the flow of current
c)
the pathway that current flows
d)
to add more power to the circuit
4.
wood is a _____?
a)
conductor
b)
insulator
5.
Iron is a _____?
a)
insulator
b)
conductor
6.
What kind of circuit is this?
a)
series
b)
parallel
7.
What type of circuit is show in the image?
a)
Series Circuit
b)
Parallel Circuit
8.
A conductor does not carry electricity.
a)
true
b)
false
9.
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 change
10.
If you replace the paper clip with a plastic spoon, what is the plastic spoon acting as?
a)
A conductor
b)
A diode
c)
An insulator
d)
A switch
11.
Which of these objects is an insulator?
a)
Copper Wire
b)
Paper Clip
c)
Steel Pole
d)
Rubber Gloves
12.
this is the symbol for a _____?
a)
open switch
b)
closed switch
c)
battery
d)
wires
13.
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
14.
Which of these substances conducts electricity the best?
a)
wood
b)
brick
c)
copper
d)
plastic
15.
what is this symbol for?
a)
light bulb
b)
switch
c)
battery
d)
resistor
16.
This is the symbol for a ...
a)
Wire
b)
Battery
c)
Buzzer
d)
Fuse
17.
This is the circuit symbol for ...
a)
an AC current source
b)
a DC current source
c)
a battery
d)
a single cell
18.
This is the symbol for
a)
An Ammeter
b)
A Voltmeter
c)
A Meter
d)
A Motor
19.
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
20.
This is the circuit symbol for ...
a)
an AC current source
b)
a DC current source
c)
an ammeter
d)
a voltmeter
21.
This is the symbol for a _____?
a)
Lamp
b)
Water wheel
c)
Loudspeaker
d)
Motor
22.
This is the symbol for a
a)
Closed switch
b)
Push switch
c)
Trap door
d)
AC Power supply
23.
This is the symbol for a _____?
a)
Fuse
b)
Resistor
c)
Heater
d)
Strip light
24.
This is the symbol for a _____?
a)
Variable resistor
b)
Thermistor
c)
Resistor
d)
Fuse
25.
As the resistance of a circuit increases, the current will
a)
increase
b)
decrease
c)
stay the same
26.
Which one, top or bottom, offers more resistance?
a)
top
b)
bottom
c)
neither
27.
We can only make electricity from fossil fuels. True or False?
a)
Science can't answer this.
b)
TRUE
c)
This only applies to America.
d)
FALSE
28.
Examine the diagram of a fossil fuel power plant. Which component spins when steam runs through it?
a)
boiler
b)
condenser
c)
generator
d)
turbine
29.
Which has more resistance? A piece of long wire or a piece of short wire?
a)
short wire
b)
long wire
c)
both
d)
neither have resistance
30.
Which has more resistance? A piece of thick wire or a piece of thin wire?
a)
thick wire
b)
thin wire
c)
both
d)
neither have resistance
31.
When does this circuit have a brighter bulb? Using a piece of thick wire or a piece of thin wire?
a)
thick wire
b)
thin wire
c)
neither
d)
use no wire at all
32.
When does this circuit have a brighter bulb? Using a piece of long wire or a piece of short wire?
a)
short wire
b)
long wire
c)
neither
d)
use no wire at all
33.
What are the following devices called?
a)
Wind Turbines
b)
Mills
c)
Converters
d)
All of them
34.
Material W, X and Y is connected to an electric circuit one at a time, as shown in the diagram below.
Which of the following could materials W, X and Y be?
a)
W – ceramic
X – cloth
Y - Iron
b)
W – Steel
X – glass
Y - plastic
c)
W – aluminium
X – copper
Y - rubber
d)
W – iron
X – copper
Y - gold
35.
Which of the following objects, when placed in a closed circuit, will cause the bulb to light up?
A: Copper wire B: Plastic ruler
C: Wooden chopsticks D: Iron nail
A: Copper wire B: Plastic ruler
C: Wooden chopsticks D: Iron nail
a)
A and B only
b)
C and D only
c)
A and D only
d)
B and C only
36.
Which is NOT an insulator.
a)
Wool
b)
Plastic
c)
Copper
d)
Glass
37.
The plastic covering is there to:
a)
Provide a conductor for electrical energy to flow.
b)
Provide an insulator so that electrical energy will not pass outside of the wires.
c)
Provide a conductor so that electrical energy can NOT flow.
d)
Provide an insulator so that electrical energy can flow.
38.
Which of the following could be used as the core of a simple electromagnet?
a)
drinking straw
b)
iron nail
c)
a soda bottle
d)
an ink pen
39.
Electric current flowing through a wire produces
a)
static electricity
b)
an open circuit
c)
a permanent magnet
d)
a magnetic field
40.
What is the purpose of an iron core in an electromagnet?
a)
to hold the loops of wire in place
b)
to make the magnetic force stronger
c)
to change the direction of the electric current
d)
to change the direction of the magnetic force
41.
A scientist observed that the needle of a compass moved when it was placed near a wire carrying an electric current. What did this observation show?
a)
Opposite charges attract.
b)
Electric current generates a magnetic field.
c)
Magnetized wires generate electricity.
d)
Like charges repel.
42.
Like poles of a magnet do what?
a)
repel
b)
attract
c)
nothing
43.
What is a wire in a circuit wrapped around an iron core called?
a)
electromagnet
b)
generator
c)
electric motor
44.
What will happen when these magnets are brought close together?
a)
They will attract each other.
b)
They will repel each other.
c)
Both magnets will turn to the left
d)
Both magnets will turn to the right
45.
Where is the strongest attraction force of the magnet?
a)
at the poles
b)
in the middle
c)
above the magnet
d)
below the magnet
46.
What happens when two north poles of a magnet are placed together?
a)
they repel
b)
they attract
c)
they cancel each other out
d)
the strength of the magnet is doubled
47.
True or False: All metals are attracted to magnet.
a)
True
b)
False
48.
Which of the following is true about a bar magnet?
a)
Its magnetic field is strongest near its center.
b)
It is surrounded by a magnetic field.
c)
The north pole is stronger than the south pole.
d)
The south pole is stronger than the north pole.
49.
If you wrap more coils around an electromagnet, it will become
a)
brighter
b)
stronger
c)
weaker
d)
invisible
50.
How do you make an electromagnet stronger?
a)
Add a motor and/or lightbulbs
b)
Add more light bulbs and/or wire coils
c)
add more wire coils and/or a switch
d)
add more wire coils and/or batteries
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