magnetic field

Magnetic field lines are closet together at the __________.

• poles
• lines

Tags

NGSS.MS-PS2-3

Magnetic field lines always cross.

• True
• False

Are the magnetic field lines in the picture correct?

• Yes, because they point from north to south.

• No, because they point from north to south (they're supposed to go the other way).

• Yes, because the North pole is on the left in all pictures.

• No, because the North pole is on the left in all pictures (it's supposed to be on the right).

Tags

NGSS.MS-PS2-3

The area of magnetic force around a magnet is known as its _____________.

• magnetic field

• magnetic declination

• magnetic fan lines

• magnetic tan lines

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Why does a compass needle point north?

• The compass is a bar magnet
• Because north is up
• Because it's magic
• It lines up with the Earth's magnetic field

Tags

NGSS.MS-PS2-5

Looking at the field lines in this picture, these two magnets are ________

• Attracting

• Repelling

• Attracting and Repelling

• Doing nothing

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

1) A wire carries a current, creating a magnetic field around itself as shown. The current in the wire is:

• A. Directed to the right

• A. Directed to the left

• A. Equal to the magnetic field

• In the same direction as the magnetic field

Tags

NGSS.MS-PS2-3

1) There are four coils of wire being used as electromagnets. They all have the same size and are made up of the same material but have a different number of loops. Which coil will produce a magnetic field with the maximum strength when the same amount of current passes through all coils?

• a coil having 25 loops

• a coil having 30 loops

• a coil having 45 loops

• a coil having 50 loops

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

1) A straight wire carries a current inside the paper. What is the direction of the magnetic field at point P?

• Points to the right

• Points to the left

• Points to the top of the page

• Points to the bottom of the page

Tags

NGSS.MS-PS2-3

1) A bar magnet is at rest, next to a fixed electromagnet. In which direction will the bar magnet move when switch S is closed?

• to the left

• to the right

• up the page

• down the page

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5