ET -- magnetic fields

A student drew magnetic field lines incorrectly. What is wrong in the drawing?

• the field lines are crossed in some places

• the lines are pointing into the south pole

• the poles are in the wrong place

• the drawing shows 2 poles

Tags

NGSS.MS-PS2-5

NGSS.MS-PS2-3

Why does a compass point North?

• The Earth's magnetic field is stronger in the North.

• A magnetized compass needle has a north pole which is attracted to the Earth's magnetic north pole.

• Earth's north geographic pole is a south magnetic pole

• A compass does not follow the "opposites attract" rule

What happens to the magnetic domains in an unmagnetized material when an external magnet is repeatedly rubbed across its surface?

• The magnetic field gains strength from the domains

• The domains in the unmagnetized material repel each other

• The domains begin to line up in the same direction.

• The domains in the unmagnetized material become larger.

Tags

NGSS.MS-PS2-5

NGSS.MS-PS2-3

What happens to Earth's magnetic field approximately every million years?

• It intensifies

• It weakens

• it moves several degrees

• It reverses

Which direction would the arrow point if you drew the vector for the magnetic field line at point 3 in the diagram?

• upwards

• toward the magnet

• away from the magnet

• downwards

Tags

NGSS.MS-PS2-5

NGSS.MS-PS2-3

Which direction would the arrow point if you drew the vector for the magnetic field line at point 4 in the diagram?

• upwards

• downwards

• to the left

• to the right

Tags

NGSS.MS-PS2-5

NGSS.MS-PS2-3

Electric, magnetic, and gravitational fields are examples of ---

• ferromagnetic forces

• kinetic forces

• non contact forces

• domain forces

Tags

NGSS.MS-PS2-5

NGSS.MS-PS2-4

Where is the magnetic field strongest?

• point A

• point B and C

• point D

• point C

Tags

NGSS.MS-PS2-5

NGSS.MS-PS2-3

What is the unit of magnetic field strength?

• Tesla

• Newton

• Joule

• Coulomb

Tags

DOK Level 1: Recall

How can you increase the magnetic field strength of an electromagnet? Chose 2 correct answers.

• Decrease the number of coils

• Increase the current passing through the coil

• Use a plastic core

• Decrease the voltage

• Increase the number of coils in the wire.

Tags

NGSS.HS-PS2-5