3/22/24 Magnetism & Electricity Test

What is magnetic force?

• A force exerted by a magnet only when it physically touches an object

• A force exerted by magnets that can be felt by objects around or near a magnet

• A force exerted by electrically charged particles

• A force exerted by magnets that makes an object become electrically charged

What is a magnet?

• An object that produces magnetic force

• An object that causes objects to become positively charged

• An object that causes objects to become negatively charged

• An object that attracts nonmetallic objects towards it

Magnetic objects are made of iron, nickel or cobalt

• True

• False

Complete the statement. The north pole of one magnet is __________ the south pole of a second magnet.

• Attracted to

• Repelled by

• Attracted to or repelled by

• Neither attracted to or repelled by

What is a magnetic material?

• A material that produces a magnetic force

• A material that is attracted to or repelled by a magnet

• A material that becomes positively charged when a magnet is brought near it

• A material that becomes negatively charged when a magnet is brought near it

How can you demagnetize a magnet?

• By running a permanent magnet over it in different directions

• By running a permanent magnet over it in the same direction

• By heating, hammering or dropping it

• By freezing it

What happens to the strength of magnetic field as you move away from the magnet?

• The strength of the magnetic field increases

• The strength of the magnetic field decreases

• The strength of the magnetic field doesn’t change

What is responsible for creating a magnetic field around Earth?

• Earth’s atmosphere

• Earth’s crust

• Earth’s mantle

• Earth’s iron core

Earth’s magnetosphere is important because:

• It deflects dangerous solar wind from the sun

• It keeps us in orbit around the Sun

• It keeps the moon in orbit around the Earth

• It prevents extraterrestrial objects from crashing into Earth

Where is Earth’s magnetic South Pole located in relation to Earth’s geographic South Pole?

• Earth’s magnetic South pole is located directly at Earth’s geographic South pole

• Earth’s magnetic South pole is located ~10° from Earth’s geographic South pole

• Earth’s magnetic South pole is located directly at Earth’s geographic North pole

• Earth’s magnetic South pole is located ~10° from Earth’s geographic North pole