WorksheetsElectromagnet Test 2023
Total questions: 38
Worksheet time: 44mins
Magnetic fields are strongest
between the poles
at the north pole
at the south pole
at both poles
What causes the magnetic field to form in an electromagnet?
Electromagnets are only called magnets because electricity is involved.
The domains of the magnet become aligned
The magnetic field is absorbed from another magnet
Electric current flowing in a wire
How can you increase the strength of an electromagnet?
By moving the iron core (nail) to create friction.
By adding more coils around the iron core (nail).
By decreasing the amount of current in the wire.
By heating up the electromagnet.
A type of magnet that has temporary magnetic effect when electric current flows through it.
This refer to
Electric
Electronic
Electrostatic
Electromagnet
Electromagnets that attract each other have more force than those that repel each other.
When two electromagnets are of opposite charges, they attract each other.
Drag and drop your amount into each box provided.
Number of coils How many paperclips electromagnet can pick up
5 (a)
10 (b)
20 (c)
30 (d)
40 (e)
The area of magnetic force around a magnet is known as its _____________.
magnetic field
magnetic declination
magnetic fan lines
magnetic tan lines
Are the magnetic field lines in the picture correct?
Yes, because they point from north to south.
No, because they point from north to south (they're supposed to go the other way).
Yes, because the North pole is on the left in all pictures.
No, because the North pole is on the left in all pictures (it's supposed to be on the right).
Looking at the field lines in this picture, these two magnets are ________
Attracting
Repelling
Attracting and Repelling
Doing nothing
+,+
+,-
-,+
-,-
Which graph best represents the relationship between the strength of an electric field and distance from a point charge?
Based on the arrangement of the electric field lines in the diagram, what are the charges?
both charges are the same
the charges are opposite
they are neutral; no charge
When an object gains electrons it becomes __________
Neutral
Positively charged
Negatively charged
which is the field for opposite charges
These magnets are...
repelling one another because opposite poles repel
attracting one another because opposite poles attract
repelling one another because like poles repel
attracting one another because like poles attract
Electric currents produce _____________
electron clouds
magnetic fields
sound waves
How can the strength of an electromagnet be increased? (mark all that apply)
increase the current flowing through the coil
increase the number of coils
add an amplifier to it
put iron core inside the coil
Which part of the electromagnets turned into a magnet when electricity flows through a coiled wire?
Battery
Copper wire
Iron Nail
Bulb
Why are paperclips attracted to magnets?
They contain paper
They contain wood
They contain iron
They contain insulators
The variable that is measured.
Controlled Variable
Dependent Variable
Independent Variable
The one factor that a scientist changes during an experiment.
Controlled Variable
Dependent Variable
Independent Variable
The height of bean plants depends on the amount of water they receive.
A study was done to find if different tire treads affect the braking distance of a car.
What is the "control" in the experiment?
The variable I change
The variable I observe or measure.
Something in the experiment that must remain constant.
A similar test with typical factors to compare the experiment to.
What factors affect the strength of magnetic forces?
Distance between the magnets
Number of magnets
Number of coils
Strength of the current
A magnetic force becomes weaker as magnets ________.
repel
attract
move together
move apart
Because of the magnetic field, magnets do not have to touch to affect each other. _________
True
False
What is the Net Force on this object?
4 N Left
4 N Right
12 N Left
8 N Left
