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Electricity & Magnetism

Total questions: 95

Worksheet time: 1hrs 26mins

Name
Class
Date
1.
____________ stops the flow of electricity.
a)
A conductor
b)
An insulator
c)
A magnet
2.
Two types of circuits are
a)
parallel and magnetic
b)
electromagnetic and series
c)
series and parallel
3.
The unit for current is the 
a)
Volt
b)
Ohm
c)
Electron
d)
Amp
4.
In a ________ circuit there are multiple paths for the current to take.
a)
Series
b)
Parallel
5.
In a _________ circuit, if one bulb goes out then the entire circuit doesn't work.
a)
Series
b)
Parallel
6.
The continuous flow of electric charges through a material is called...
a)
Electric Field
b)
Electric Force
c)
Electric Current
d)
Electric Circuit
7.
Identify the conductor below.
a)
cloth rag
b)
plastic bottle
c)
gold ring
8.
What is the unit for resistance?
a)
Volts
b)
Amperes
c)
Ohms
9.

If the battery produced 12.6 Volts and what would be the current flow be for a 6 Ohm resistor


Current=Voltage ÷ resistance

a)

2.1 Amps

b)

2.4 Amps

c)

1.71 Amps

d)

15 Amps

10.

What voltage is needed to cause a 2A current flow through a 10Ω resistor?


Voltage = current x resistance

a)

5V

b)

0.2V

c)

20V

d)

200V

11.

What is the resistance of a 20V bulb with 5A through it?

a)

4 V

b)

100V

c)

4 Ω

d)

100 Ω

12.

What is the current through a 99V bulb with a resistance of 11 Ω?


current = voltage ÷ resistance

a)

9W

b)

9A

c)

60V

d)

60A

13.
This circuit won't work. What essential part is missing from this circuit?
a)
resistance
b)
source of electric current
c)
conductor
d)
ammeter
14.
The force that pushes the electricity through a circuit is called...
a)
resistance
b)
voltage
c)
current
d)
switch
15.
The flow of electricity through a conductor is called...
a)
resistance
b)
voltage
c)
current
d)
source of electric current
16.
The best conductors for electricity are made of...
a)
wood
b)
plastic
c)
rubber
d)
metal
17.
This measures the speed of the current in a circuit
a)
voltage
b)
ammeter
c)
switch
d)
resistance
18.
What slows down the flow of electricity in a circuit?
a)
resistance
b)
voltage
c)
current
d)
source of electric current
19.
Which circuit (s) are parallel?
a)
A
b)
A and B
c)
B and C
d)
C
20.
Which one will still function if one light bulb goes out?
a)
A-Series
b)
B-Parallel
c)
A-Parallel
d)
B-Seriese
21.
Security alarms are made of _______ circuits because they turn on when the circuit is broken.
a)
Parallel
b)
Series 
c)
Fancy 
22.
If I add more light bulbs to a series circuit what happens?
a)
The current speeds up and the lights get brighter
b)
The current slows down and the lights dim lower
c)
The current speeds up and the lights dim lower
d)
The current slows down and the lights get brighter
23.

Why does the following circuit not work?

a)

The light bulb is broken

b)

The switch is closed

c)

The wood block is an insulator

d)

The battery is dead

24.

The circuit does not work, what could you do to allow the circuit to work?

a)

Add another light

b)

Add another battery

c)

Open the switch

d)

Remove the wood block and connect the wires

25.

Which lights would turn on if your closed switches 1 and 2?

a)

red, blue, and white

b)

red and white

c)

red and blue

d)

blue, white, yellow

26.

The light bulb does not turn on, which statement explains why it is not working?

a)

The battery is dead

b)

The light bulb is broken

c)

The bell is taking all of the energy

d)

The light bulb is not part of a complete circuit

27.

Does energy flow through an open or closed switch?

a)

open switch

b)

closed switch

c)

both open and closed

d)

neither

28.
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.
29.
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.
30.
What is a battery?
a)
switch
b)
power source
c)
insulator
31.
A complete circuit has .......
a)
a motor in it
b)
a switch in it
c)
two bulbs in it
d)
no breaks in it
32.
An incomplete circuit is shown.
To complete the circuit, a wire should be placed from —
a)
Point D to Point C
b)
Point B to Point C
c)
Point A to Point D
d)
Point B to Point D
33.
Batteries convert what type of energy into electricity?
a)
Chemical energy
b)
Mechanical energy
c)
Both
d)
Kinetic energy
34.
Which bulbs will light?
a)
1 and 2
b)
2 and 3
c)
3 and 4
d)
4 and 2
35.
Lightbulbs use electricity to make light. What else do lightbulbs often give off?
a)
Food energy
b)
Heat Energy
c)
Solar Energy
d)
Wind Energy
36.
The type of circuit used in your home is a _______ circuit.
a)
series
b)
parallel
37.
Choose the correct sentence.
a)
This circuit will work because it is an open circuit.
b)
This circuit will work because it is a closed circuit.
c)
This circuit will NOT work because it is an open circuit.
d)
This circuit will NOT work because it is a closed circuit.
38.
this is the symbol for a _____?
a)
switch
b)
light 
c)
battery
d)
wires
39.

what is this symbol for?

a)

light bulb

b)

cell

c)

battery (2 batteries)

d)

resistor

40.
This is the symbol for a ...
a)
Bulb
b)
Battery
c)
Horn
d)
Fuse
41.
This is the symbol for a ...
a)
Wire
b)
Battery
c)
Buzzer
d)
Fuse
42.
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
43.
Electrical charge built up on the surface of an object is called _________________.
a)
static electricity
b)
current electricity
c)
lightning
d)
electrons
44.

What is the major difference between static electricity and current electricity?

a)

Current electricity involves a continuous flow of elecrons; static electricity is a sudden transfer of protons

b)

Current electricity can be deadly; static electricity is almost always safe

c)

In current electricity, there's a single transfer of electrons; in static electricity, there's a steady flow of electrons

d)

Current electricity involves a flow of electrons; static electricity involves a single transfer of electrons

45.

Which is not a way to increase bulb brightness of one of the light bulbs in this circuit?

a)

remove the second light bulb and then close the circuit

b)

add another battery

c)

use a higher power battery

d)

add an additional light bulb

46.

Which is a factor of resistance?

a)

length of the wire

b)

width of the wire

c)

temperature

d)

all of the above

e)

none of the above

47.
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
48.
A north pole and a south pole will attract.
a)
True
b)
False
49.
True or False: All metals stick to magnets.
a)
True
b)
False
50.
True or False:
Most rocks are magnetic.
a)
True
b)
False
51.
Magnetism is a type of ____________
a)
force
b)
book
c)
plant
d)
animal
52.
When two magnets attract, they ______________
a)
push apart
b)
change color
c)
get colder
d)
pull together
53.
When two magnets repel, they ________________
a)
change color
b)
pull together
c)
push apart
d)
get colder
54.
The force of magnetism is stronger when magnets are ________________
a)
cold
b)
round
c)
closer together
d)
farther apart
55.

Magnets can pull on things without touching them.

a)

True

b)

False

56.

When iron touches a magnet, it becomes a magnet too.

a)

True

b)

False

57.

Once a paperclip touches a magnet and becomes a magnet itself, does a paperclip STAY that way? Or does it stop being a magnet?

a)

stay that way forever

b)

stop being a magnet

c)

stay that way for a short time

58.
Magnets have a north and a south ___________
a)
shape
b)
color
c)
pole
d)
region
59.

Where on a magnet is the magnetic force strongest?

a)

The Poles

b)

All over

c)

Middle

60.

Earth is like a giant magnet due to....

a)

its liquid iron core

b)

the wind patterns of Coriolis Effect

c)

the alignment of the continents

d)

solar particles moving through the atmosphere

61.

Where is Earth's magnetic field strongest?

a)

Along the outside lines

b)

Along the inside lines on either side

c)

Where the lines are close together at the poles

d)

In the space outside of the lines

62.

When _______________ travels through a

conductor, a magnetic field is created

a)

current

b)

a magnetic field

c)

neutrons

63.

Electric currents produce _____________

a)

electron clouds

b)

magnetic fields

c)

sound waves

64.

How can the strength of an electromagnet be increased? (mark all that apply)

a)

increase the current flowing through the coil

b)

increase the number of coils

c)

add an amplifier to it

d)

put iron core inside the coil

65.
What subatomic particle causes magnetism in an atom? 
a)
protons
b)
neutrons
c)
electrons
d)
nucleus
66.
Which metals are attracted to magnets? 
a)
iron, nickel, cobalt
b)
gold, silver, platinum
c)
copper, magnesium, aluminum
67.
Which is not a property of a magnet? 
a)
all magnets have two poles
b)
all magnets have a force of attraction or repulsion
c)
all magnets are surrounded by a magnetic field
d)
all magnets can be turned off
68.
What items will a magnet attract?
a)
Beach ball, glass
b)
nails, paper clip
c)
book, paper
d)
golf ball, glue
69.
This large crane magnet functions only when the electrical current is ON.  The crane magnet is an example of what type of magnet?
a)
NIB Magnet
b)
Ceramic Magnet
c)
Electromagnet
d)
funnel magnet
70.

Electrons which collect at the negative end of the battery, can flow to the positive end through a ___________________

a)

wire

b)

electron cloud

c)

magnet

71.

What kind of magnet can be turned on and off?

a)

refrigerator magnet

b)

electromagnet

c)

magnetite

d)

iron

72.
This is a picture of a simple electromagnet. How can the electromagnet be made stronger?
a)
Add more coils of wire to the nail.
b)
Use a smaller battery.
c)
Reverse the poles of the magnet.
d)
Remove all the coils and the nail.
73.
How do electromagnets differ from regular magnets? 
a)
A. They  can be turned off and on 
b)
B. Their polarity can be reversed
c)
C. Their strength can be changed
d)
D. All of the above
74.
A compass needle responds to a magnetic field, because the compass needle is a
a)
A. generator.
b)
B. motor.   
c)
C. magnet.
d)
D. transformer.
75.
Generators are devices that convert _____ energy into _____ energy.
a)
chemical; mechanical
b)
mechanical; electrical
c)
electrical; mechanical
d)
potential; kinetic
76.
Electric motors are devices that convert _____ energy into  _____ energy.
a)
electrical; mechanical
b)
mechanical; electrical
c)
chemical; potential
d)
mechanical; kinetic
77.

In a _______ a spinning turbine moves magnets which generates an electric current.

a)

Motor

b)

Generator

78.
Is music playing from a record an analog or digital signal?
a)
Analog
b)
Digital
79.
Is a video game coded as analog or digital data?
a)
Analog
b)
Digital
80.
Analog signals can be converted to digital through a process called _____.
a)
conversion
b)
processing
c)
sampling
d)
translation
81.

This is a signal that fluctuates exactly like the original signal.

a)

Analog

b)

Digital

c)

High Definition

d)

Binary

82.
The signal above is an example of a(n)
a)
Digital Signal
b)
Analog Signal
83.
Which is an example of an analog signal?
a)
Blu-Ray DVD
b)
VHS Tape
84.
Smooth and continuous data
a)
analog
b)
digital
c)
pulse
d)
binary
85.

A big disadvantage of digital technology is the recording does degrade over time.

a)

True

b)

False

86.

An analog signal is sent in discrete pulses in two states, on= 1 or off= 0.

a)

True

b)

False

87.
Is this digital or analog?
a)
Digital 
b)
Analog
88.
Is this digital or analog?
a)
Digital 
b)
Analog
89.

The picture shows an example of what kind of signal?

a)

Analog

b)

Digital

90.
Morse code is a type of _____________ signal.
a)
digital
b)
analog
91.
An analog signal is...
a)
continuous
b)
in pulses
92.

Identify a disadvantage of an analog signal:

a)

Requires low power

b)

Doesn't get interference

c)

When copied, quality goes down

d)

Hardware is usually small

93.
What is true about a digital signal?
a)
They are easily distorted or affected by interference
b)
They take up more space
c)
They require more information
d)
They are generally considered more reliable
94.

Which of the following is an advantage of analog signals

a)

Less prone to interference

b)

Requires less power

c)

Travels Farther

d)

Can carry more detailed information

95.

Something that consumes electricity in a circuit is also known as the _____________________.

a)

power source

b)

connector

c)

switch

d)

load

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