Magnetism and Compasses

Which is not true about magnetic field?

• A magnetic object has a field around it.

• The field around a magnetic object can be seen using magnetic filings.

• Magnetic force in the field increases as you move away from the object.

• If a second magnetic object is placed in the field it will experience repulsive or attractive force.

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What would happen if you cut a magnet in half?

• The material will no longer be magnetic.

• One magnet will be the south pole and other the north pole.

• Each half of the magnet will have a south and north pole.

• Each magneti will be stronger than the original magnet.

One of Earth’s Magnetic Field purpose is...

• To protect us from solar winds

• To protect us from aliens

• To give Earth energy

• To make lighting storms

The interaction between electricity and magnetism is ____.

• Electromagnetism

• Thermal energy

• Electrical energy

• Electricity

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Four plotting compasses are placed in the magnetic field of two identical bar magnets as shown in the diagram. Which compass is pointing in the wrong direction?

• A

• B

• C

• D

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The north pole of a bar magnet is placed next to end P of an iron bar PQ, as shown. As a result, magnetic poles are induced in the iron bar.

• A

• B

• C

• D

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A magnet will be attracted to the objects which are made of ____________.

• steel and iron

• steel and copper

• aluminum and gold

• copper and brass

Two iron nails hang from a bar magnet. Which diagram shows the magnetic poles induced in the nails?

• 
• 
• 
• 

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NGSS.MS-PS2-3

Which of the following is true about a bar magnet that is divided into two pieces?

• Two new bar magnets were made.

• The magnetlost its magnetism.

• Magnetic poles were separated.

• The magnet increased its magnetism.

Ferromagnetic materials that retain the magnetism induced in them become permanent magnets.

• True

• False

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