AP Physics C Flux

The diagram shows an electron current in a wire loop. What is the direction of the magnetic field at the center of the loop?

• into this screen

• out of this screen

• clockwise

• counterclockwise

Tags

NGSS.HS-PS2-5

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

• into this screen

• out of this screen

• toward the top of this screen

• toward the bottom to this screen

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

Four infinitely long wires are arranged as shown in the accompanying figure end-on-view. All four wires are perpendicular to the plane of the screen and have the same magnitude of current I. The conventional current in the wire in the upper right hand corner is directed into the plane of the screen. The other conventional currents are out of the plane of the screen. Point P is a distance a from all four wires. What is the total magnetic field at point P?

• 
• 
• 
• zero

Tags

NGSS.HS-PS2-5

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

• A

• B

• C

• D

Tags

NGSS.HS-PS2-5

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

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

• out of this screen

• toward J

• toward K

• into this screen

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

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 top of this screen.

• The force is directed toward the bottom of this screen.

• The force is directed toward the right.

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

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

What is the definition of electric flux in the context of AP Physics C?

• The rate of flow of electric charge through a surface

• The total electric field passing through a given area

• The potential difference across a conductor

• The resistance of a material to electric current

Which of the following equations represents the electric flux through a surface?

• @@ \Phi_E = E \cdot A \cdot \cos(\theta) @@

• @@ \Phi_E = \frac{E}{A} @@

• @@ \Phi_E = E \cdot A \cdot \sin(\theta) @@

• @@ \Phi_E = E + A + \theta @@

In Gauss's Law, the electric flux through a closed surface is proportional to which of the following?

• The total charge enclosed by the surface

• The surface area of the closed surface

• The electric field strength outside the surface

• The distance from the charge to the surface