Electromagnetism

Name 3 types of metals that are attracted by magnets.

• iron, cobalt, nickel

• brass, lead, bronze

• copper, iron, nickel

• cobalt, aluminum, nickel

Tags

NGSS.MS-PS2-3

What does the law of charges state?

• opposite poles repel, like poles attract

• no matter what pole is given, the magnets will always attract

• like poles repel, opposite poles attract

• none of the above

Tags

NGSS.MS-PS2-3

Where is the magnetic field strongest?

• the middle of the magnet

• the poles

• only the south pole

• only the north pole

Tags

NGSS.MS-PS2-5

How does the magnetic field change due to the distance between the magnet and object?

• the farther the object is, the stronger the magnetic field is; the closer, the weaker the force becomes.

• no matter where the object is in relation to the magnet it will always attract.

• no matter where the object is in relation to the magnet it will always repel.

• the closer the object is, the stronger the magnetic field is; the farther, the weaker the force becomes.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Name 2 ways to demagnetize a magnet

• change the temperature of the surrounding environment; hit it hard or drop it

• put the magnet in a strong field, similar to its own; hit it hard or drop it

• rub it with your finger; change the temperature of the magnet

• hit it hard or drop it; put the magnet in a strong opposing magnetic field.

Which picture represents magnets of attracting forces?

• 
• 

Tags

NGSS.MS-PS2-3

Which picture represents magnets of repelling forces?

• 
• 

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Which charge transfers between objects?

• protons

• neutrons

• nucleus

• electrons

If an atom has an equal number of protons and electrons, what is the overall charge?

• negative

• no charge (neutral)

• positive

When you rub a balloon against your hair which object has the positive and negative charge?

• balloon - negative; hair - positive

• balloon - positive; hair - negative