WorksheetsMagnetism
Total questions: 17
Worksheet time: 24mins
Name
Class
Date
1.
Look at the electric circuit above:
a)
The circuit is closed.
b)
It doesn't include a load.
c)
The circuit is open.
d)
It does not include an electrical source.
2.
What is electric current?
a)
A flow of electric charges.
b)
static electricity.
c)
two objects repelling from each other.
d)
batteries.
3.
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.
4.
What is the device seen here?
a)
generator
b)
electric motor
c)
electromagnet
d)
magnet
5.
Rubbing a balloon on a wool jumper can cause a build up of static electricity, this occurs because...
a)
protons prefer to be present on the balloon surface
b)
electricity is moving from one charged surface to another
c)
wool jumpers are good conductors of electricity
d)
friction between the two surfaces causes electrons to build up on one side
6.
If a magnet is pushed into a coil, voltage is induced across the coil. If the same magnet is pushed
into a coil with twice the number of loops,
into a coil with twice the number of loops,
a)
a. one-half as much voltage is induced.
b)
b. the same voltage is induced.
c)
c. twice as much voltage is induced.
d)
d. four times as much voltage is induced.
7.
In an electric motor, the coil of the electromagnet is connected to a ________ or other source of electric current.
a)
battery
b)
engine
c)
wire
d)
magnet
8.
The picture below shows a device made of a battery, a nail, and a long piece of copper wire. It converts electrical energy into a different form of energy. Which term describes the device in the illustration?
a)
electric switch
b)
electromagnet
c)
electric motor
d)
electric generator
9.
What type of force is holding this balloon to the wall?
a)
Applied
b)
Gravitational
c)
Magnetic
d)
Electrical
10.
What type of force causes these balloons to move toward or away from each other?
a)
Gravitational
b)
Applied
c)
Magnetic
d)
Electrical
11.
A simple electromagnet can be made with which of the following?
a)
an electric current
b)
a turbine and nail
c)
a nail, a wire, and a battery
d)
a compass and a battery
12.
A student makes an electromagnet as shown above and finds that it is only strong enough to pick up one paper clip. What modification will she need to do in order to make it pick up three paper clips?
a)
wrap more coils around the nail
b)
use staples instead of paper clips
c)
replace the battery with a bar magnet
d)
use paper clips made of aluminum
13.
Bob made an electromagnet but it was very weak. How can he make it stronger?
a)
take away a d-cell
b)
wrap the wire loosely
c)
use thicker wire
d)
use less winds
14.
Which component provides the stored energy to run the electromagnet?
a)
d cell
b)
core
c)
coil
d)
wire
15.
What do the lines around this magnet represent?
a)
North Pole
b)
South Pole
c)
Magnetic Declination
d)
Magnetic Field
16.
Produces an electric current when a coil of wire wrapped around an iron core is rotated near a magnet.
a)
generator
b)
electric motor
c)
electromagnet
17.
The coil of the electromagnet must be connected to a __________ or another source of electricity.
a)
battery
b)
wire
c)
magnet
100 %
