Magnetism

What will happen when these magnets are brought close together?

• They will attract each other.

• They will repel each other.

• Both magnets will turn to the left

• Both magnets will turn to the right

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

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

• A permanent magnet requires more electricity than an electromagnet to become magnetized

• An electromagnet loses its magnetic properties when the current is turned off

• An electromagnet is always stronger than a permanent magnet

• The poles on an electromagnet repel each other instead of attract

A device consisting of a power source and a coil of wire is known as a(n)  

• North pole

• South pole

• Permanent magnet

• Electromagnet

Which of the following statements are true about permanent magnets and electromagnets?    

• Permanent magnets can have their poles reversed

• Electromagnets can have their magnetic field strength changed

• Permanent magnets can use electricity

• Electromagnets only have a south pole or north pole, not both

Tags

NGSS.MS-PS2-5

Where will the magnetic field of a magnet always be strongest? 

• The north pole

• The south pole

• Both poles

• It is equal strength at any point on the magnet

What is the difference between an ordinary piece of iron and a piece of iron that is magnetized?  

• The magnetized iron has its electron domains lined up the same way

• The ordinary iron has its electron domains lined up the same way

• The magnetized iron is positively charged while the ordinary iron is negatively charged

• The ordinary iron is negatively charged on one end and positively charged on the other so the charges cancel out

Tags

NGSS.MS-PS2-3

Why does a compass needle change the direction it’s pointing when you bring it near a wire that has current running through it?

• The wire has a positive charge and attracts the negative charge in the compass needle

• The wire has a negative charge and attracts the negative charge in the compass needle

• The current in the wire produces a magnetic field that the compass needle reacts to

• The compass needle is reacting to electrons leaving the wire

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

A paper clip is an example of a:

• magnetic material

• permanent magnet

• bar magnet

• insulator

Tags

NGSS.MS-PS2-3

In un-magnetized materials the domains are __________ aligned.

• super

• slightly

• randomly

• always

Tags

NGSS.MS-PS2-3

Two south poles will...

• attract

• repel 

Tags

NGSS.MS-PS2-3