Magnets and electromagnets

The places where a magnetic forces of a magnet are strongest are called ...

• magnetic equator
• magnetic field
• magnetic poles
• magnetic core

Two like poles always .....

• neutralize
• attract
• combine
• repel

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.

Which of these metals is not magnetic?

• Iron
• Nickel
• Copper

• Steel

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.

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.