AP Physics 2

A compass is located at point X near a bar magnet as shown in the diagram. Which diagram shows the proper direction of the compass needle?

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When two ring magnets are placed on a pencil, magnet A remains suspended above magnet B, as shown. Which statement describes the gravitational force and the magnetic force acting on magnet A due to magnet B?

• The gravitational force is attractive and the magnetic force is repulsive.

• The gravitational force is repulsive and the magnetic force is attractive.

• Both the gravitational force and the magnetic force are attractive.

• Both the gravitational force and the magnetic force are repulsive

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-5

The diagram shows a coil of wire connected to a battery. The N-pole of this coil is closest to

• A

• B

• C

• D

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NGSS.HS-PS2-5

NGSS.HS-PS3-5

Which of the following is true about field lines? (Select all that apply)

• They go from a north magnetic pole to a south magnetic pole

• They go from a south magnetic pole to a north magnetic pole

• Their spacing shows the strength of the field

• They cannot cross

Answer explanation

Just like for electric fields, magnetic field lines allow us to represent the features of a magnetic field. Their spacing and direction indicate the strength and direction of the field and they start at the north magnetic pole and end at the south magnetic pole (never crossing!).

Tags

NGSS.HS-PS3-5

How does a magnetic field affect a moving electric charge?

• It doesn't

• It exerts a force parallel to the velocity of the charge and parallel to the direction of the field

• It exerts a force perpendicular to the velocity of the charge and parallel to the direction of the field

• It exerts a force perpendicular to the velocity and perpendicular to the direction of the field

Answer explanation

Remember your right hand rule! The velocity the charge, the direction of the field, and the force the charge experiences are all perpendicular to each other.

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

How do we represent vectors going out of the page?

Answer explanation

Hopefully, you drew an dot or circle! Imagine an arrow: if it's going out of the page, we can see the pointy tip of the arrow.

Which image represents a magnetic field out of the page, and a charged particle moving to the left?

• Left

• Middle

• Right

Answer explanation

Right-hand rule!

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

What does a magnetic field around a current-carrying straight wire look like?

• Field lines come out of the wire in every direction

• Field lines circle around the wire

• Field lines bend from one side of the wire to the other

• The wire would have no field lines because it doesn't have a magnetic field

Answer explanation

Think about the right-hand rule: if your thumb points in the direction of current, your fingers will curl around in the direction of the field lines

Tags

NGSS.HS-PS2-5

What does a magnetic field around a current-carrying solenoid look like?

• Field lines come out of the solenoid in every direction

• Field lines circle around the solenoid

• Field lines go straight through the loops then bend from one end of the solenoid to the other

• The solenoid would have no field lines because it doesn't have a magnetic field

Answer explanation

Inside the solenoid, the field lines are straight, but outside the solenoid, it looks similar to the field lines of a bar magnet

Tags

NGSS.HS-PS2-5

If I put a magnet that can freely move into a magnetic field, what will happen?

• Nothing

• It will turn to be perpendicular to the field lines

• It will turn to be parallel to the field lines, with the magnet's north pole pointed towards the field's south pole

• It will turn to be parallel to the field lines, with the magnet's north pole pointed towards the field's north pole

Answer explanation

Remember, north is attracted to south and vice versa.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5