The diagram shows the magnetic field lines between two magnetic poles, A and B. Which statement describes the polarity of magnetic poles A and B?

A is a north pole and B is a south pole.

A is a south pole and B is a north pole.

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

Electrons are flowing in a conductor as shown in the diagram. What is the direction of the magnetic field at point P?

toward the bottom of this screen

The diagram shows a conductor carrying a current in which the electron flow is from left to right. The conductor is located in a magnetic field which is directed into this screen. The direction of the magnetic force on the conductor will be

toward the bottom to this screen

An object with charge - q is in motion near a wire that has a current I to the right. At the instant shown in the figure, the object is traveling to the right with speed v . Both the wire and the motion of the object are in the plane of the page. Which of the following statements is true about the force on the object due to the current I at the instant shown?

The force is directed toward the bottom of this screen.

The force is directed toward the top of this screen.

The force is directed toward the right.

There is no force on the object due to the current.

A loop of wire is connected to an ammeter, as shown, and held in place. The ammeter has a scale with zero in the middle and a needle that moves away from zero in either direction to measure the magnitude and direction of any current in the loop. A bar magnet is held above the center of the loop and released from rest. Which of the following best describes the action of the ammeter needle as the magnet falls through the loop?

The ammeter needle deflects in one direction as the north end of the magnet approaches the loop, returns to zero when the center of the magnet is in the loop, and deflects in the other direction when the south end of the magnet is moving away from the loop.

The ammeter needle remains at zero.

The ammeter needle deflects in one direction as the magnet approaches, passes through, and moves away from the loop.

The ammeter needle deflects in one direction as the north end of the magnet approaches the loop, returns to zero when the center of the magnet is in the loop, and deflects in the same direction when the south end of the magnet is moving away from the loop.

Magnetic Fields AP Physics

Authored by Charles Martinez

Science

11th - 12th Grade

NGSS covered

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25 questions

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MULTIPLE CHOICE QUESTION

5 mins • 1 pt

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

Tags

NGSS.HS-PS2-5

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Which particle would produce a magnetic field?

A stationary charged particle

A neutral particle moving in a straight line

A moving charged particle

A neutral particle moving in a circle

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

In the diagram, when the conventional current is flowing in the direction indicated by the arrow, the direction of the force in the wire will be

toward the south pole

toward the north pole

into this screen

out of this screen

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

An electron in a magnetic field travels at constant speed in the circular path represented in the diagram. Which arrow represents the direction of the net force acting on the electron when the electron is at position A?

Tags

NGSS.HS-PS2-1

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

The field around a permanent magnet is caused by the motions of

electrons

protons

nucleons

neutrons

Tags

NGSS.MS-PS2-5

NGSS.MS-PS2-3

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

In the diagram, electrons flowing through the wire as shown will cause the wire to move toward the

top of this screen

bottom of this screen

south pole

north pole

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

The diagram represents an electromagnet. The arrows indicate the direction of the magnetic field. What is the polarity of K?

positive

north

negative

south

Tags

NGSS.HS-PS2-5

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Magnetic Fields AP Physics

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

Which particle would produce a magnetic field?

In the diagram, when the conventional current is flowing in the direction indicated by the arrow, the direction of the force in the wire will be

An electron in a magnetic field travels at constant speed in the circular path represented in the diagram. Which arrow represents the direction of the net force acting on the electron when the electron is at position A?

The field around a permanent magnet is caused by the motions of

In the diagram, electrons flowing through the wire as shown will cause the wire to move toward the

The diagram represents an electromagnet. The arrows indicate the direction of the magnetic field. What is the polarity of K?

A beam of electrons is directed from point A toward point B between the poles of the magnet. As the beam passes between J and K, it will be deflected

If the voltage of the power source is increased, the magnitude of the flux density between the poles of the magnet will

An electron traveling at a speed (V) in the plane of this screen enters a uniform magnetic field. Which diagram best represents the condition under which the electron will experience the greatest magnetic force as it enters the magnetic field?

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