Magnetism

Which statement is true?

• Magnetic field lines run from a south pole to a north pole.
• Magnetic field lines run from a north pole to a south pole.
• There are no magnetic field lines inside a magnet.
• Iron is attracted to north pole but repelled from south pole

What does the first Right Hand Rule tell you?

• Fingers point to current and the thumb points toward thumb
• Fingers are the magnetic field & thumb direction of current
• Fingers are current and thumb is direction of magnetic field
• Thumbs up is the OK sign for magnetic field to work

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

How does an electromagnet work?

• You push a magnet into an electrical socket
• Wrap wire around a nail and touch it to a magnet
• Run electrical current through a coil of wire
• push an iron nail into an electrical socket

Tags

NGSS.MS-PS2-3

A positively charged particle from the sun approaches Earth’s magnetic field as shown.

• toward the top of the page
• inward toward the page
• toward the bottom of the page
• outward from the page

F = q v B sinθ
An alpha particle has a charge of 2e. A proton (charge e) moves through a magnetic field with velocity v. The alpha particle moves through the same field in the same direction and feels the same force. What is the velocity of the alpha particle?

• 2v
• v
• 0.5v
• 0.25v

F = q v B sinθ
A proton with a charge e feels a magnetic force F when moving through a magnetic field. If the speed of the proton is doubled, what is the new magnetic force on the proton?

• 4*F
• 3*F
• 2*F
• F (same)

Two north poles will attract.

• True
• False

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

What is responsible for the Magnetic Field around Earth?

• The Earth's crust
• The Earth's molton iron core
• The Earth's mantel
• The Sun

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

If you cut a magnet in half, what happens to the poles?

• One half gets the North Pole, the other half gets the South Pole
• Both halves get only a North Pole
• Both halves get only a South Pole
• Both halves get a North pole and a South Pole

The force of magnetism is stronger when magnets are ________________

• cold
• round
• closer together
• farther apart

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5