WorksheetsMagnets and electromagnets
Total questions: 17
Worksheet time: 9mins
The places where a magnetic forces of a magnet are strongest are called ...
Two like poles always .....
Which statement is FALSE?
Only some metals are magnetic.
A magnet will attract both ends of a magnetic material.
A magnet will attract one end of a magnetic material and repel the other.
Magnetic forces are non-contact forces.
Which of these metals is not magnetic?
Copper
Steel
A magnetic material that becomes a magnet when placed in a magnetic field is known as ...
an inducted magnet.
an induced magnet.
a temporary magnet.
an electromagnet.
The Earth's magnetic field is thought to be due to ...
Magnetic materials in the Earth's crust.
Molten iron and nickel in the Earth's outer core.
Solid iron and copper in the Earth's inner core.
A giant bar magnet in the inner core.
Which diagram correctly shows the magnetic field pattern for a bar magnet?
A
B
C
D
What is the pole under the green box?
north pole
south pole
Which statement about magnetic field patterns is INCORRECT?
Magnetic field lines touch at the poles.
The further apart field lines are the weaker the field's strength.
Field lines always point into a south pole from a north.
The greater the distance from a magnet the weaker the field's strength.
What pole is hidden beneath the green box?
north pole
south pole
How do iron filings indicate where the strongest part of a magnetic field is?
They don't.
They are more concentrated.
They are less concentrated.
An insulated coil of wire with a current passing through it is known as ...
an induced magnet.
an electromagnet.
a solenoid.
a transformer.
What is the direction of the magnetic field lines produced by the current in this diagram?
up
down
clockwise
anti-clockwise
What is the direction of the magnetic field lines produced by the current in this diagram?
up
down
clockwise
anti-clockwise
Which reason for using an iron core in an electromagnet instead of steel is INCORRECT?
Iron is more easily magnetized.
Iron is less easily demagnetized.
Steel is less easily demagnetized.
Iron creates a stronger magnetic field.
Which of the following changes would NOT increase the strength of an electromagnet.
Increasing the current.
Increasing the number of turns of the coil.
Increasing the thickness of the wire.
Increasing the diameter of the coil.
