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Science: Middle School: Grades 6, 7 and 8 Quiz - Electromagnets (Questions)

This Science quiz is called 'Electromagnets' and it has been written by teachers to help you if you are studying the subject at middle school. Playing educational quizzes is a fabulous way to learn if you are in the 6th, 7th or 8th grade - aged 11 to 14.

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An electromagnet is a magnet made by using electricity. In the field of Science, electromagnetism is one of the four fundamental interactions of nature.

See how much you know in our electromagnets quiz - and try not to get too stuck!

The magnetic field around a straight wire carrying an electric current has .......

[ ]	A circular shape
[ ]	A diamond shape
[ ]	A square shape
[ ]	An oval shape

The magnetic field around a coil of wire carrying current .......

[ ]	Is a circular shape
[ ]	Is a diamond shape
[ ]	Is a square shape
[ ]	Is the same shape as around a bar magnet

If the current direction through the wire is reversed, the direction of the magnetic field .......

[ ]	Is also reversed
[ ]	Stays in the same direction
[ ]	The current stops flowing
[ ]	There is no magnetic field

If the current in the wire increases, what happens to the strength of the magnetic field?

[ ]	It decreases
[ ]	It increases
[ ]	It stops the magnetic field
[ ]	No change

Which of the following is NOT true about the magnetic field around a coil of wire carrying a current?

[ ]	Changing the direction of the current will reverse the poles
[ ]	Increasing the number of coils will increase the strength
[ ]	Making the coil wider will increase the strength
[ ]	Putting an iron core into the coil will increase the strength

What is the difference between an electromagnet and a permanent bar magnet?

[ ]	Electromagnets are stronger
[ ]	Electromagnets can be turned off
[ ]	Permanent magnets are stronger
[ ]	Permanent magnets can be turned off

Which of the following uses an electromagnetic effect?

[ ]	Iron
[ ]	Light bulb
[ ]	Toaster
[ ]	Washing machine

A relay uses a small current to .......

[ ]	Attract a magnet
[ ]	Repel a magnet
[ ]	Switch off a current
[ ]	Switch on a larger current

A relay is used in .......

[ ]	A car ignition
[ ]	An electric bell
[ ]	An electric cooker
[ ]	An iron

10.

An electromagnet is used in a scrapyard because .......

[ ]	It can be turned on and off
[ ]	It can't be turned on and off
[ ]	It is stronger than a permanent magnet
[ ]	It is weaker than a permanent magnet

Science: Middle School: Grades 6, 7 and 8 Quiz - Electromagnets (Answers)