Unit 1 AP E&M review

Charges of +2q, +q, and –q are distributed in an area as shown above. Consider a Gaussian surface located around the +2q charge, with a point P located on the surface as shown. Which of the statements below is true?

• The electric field at P depends only on the +2q charge.

• The electric field is the same everywhere on the Gaussian surface.

• The electric field is the same everywhere inside the Gaussian surface.

• The net flux through the Gaussian surface depends only on the +2q charge.

• The net electric field at point P can be determined using the Gaussian surface shown.

Tags

NGSS.HS-PS3-5

An electric field does 4 J of work on a charged particle, moving it from a potential of 1 V to a potential of 3 V. The particle has a charge of:

• -8 C

• +8 C

• -2 C

• +0.5 C

• -0.5 C

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-5

Two large, parallel conducting plates are separated by a distance d. The two plates are given each given an equal magnitude of charge Q, but with opposite polarities, so a constant electric field E exists between the plates. A particle of mass m and charge +q is released from rest at the surface of the positively-charged plate. Its velocity just before it reaches the surface of the negative plate is:

• 
• 
• 
• 
• 

Tags

NGSS.HS-PS2-1

A rod-shaped positively-charged insulator is brought near a conducting sphere, and the sphere is momentarily grounded as shown in Diagram I. The conducting sphere is then placed near a nonconducting plane as shown in Diagram II. Which of the following statements is true for Diagram II?

• The conductor has a negative charge and is attracted to the nonconducting plane.

• The conductor has a negative charge and is not attracted to the nonconducting plane.

• The conductor has a positive charge and is attracted to the nonconducting plane.

• The conductor has a positive charge and is not attracted to the nonconducting plane.

• The conductor has no charge.

Three point charges, of charge +Q, -2Q, and +3Q, are placed equidistant as shown. Which vector best

describes the net direction of the electric force acting on the +Q charge?

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• 

Tags

NGSS.HS-PS2-4

Two charges, of magnitude –Q and +4Q, are located as indicated in the diagram above. At which position will the electric field due to these two charges be zero?

• A

• B

• C

• D

• E

Tags

NGSS.HS-PS2-4

Positive charge Q is uniformly distributed over a thin ring of radius a that lies in a plane perpendicular to the x-axis. with its center at the origin 0, as shown above. Which of the following graphs best represents the electric field along the positive x-axis?

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A conducting sphere of radius R carries a charge Q. Another conducting sphere has a radius R/2, but carries the same charge. The spheres are far apart. The ratio of the electric field near the surface of the smaller sphere to the field near the surface of the larger sphere is most nearly

• 1

• 2

• 4

Tags

NGSS.HS-PS2-4

A closed surface, in the shape of a cube of side a, is oriented as shown above in a region where there is a constant electric field of magnitude E parallel to the x-axis. The total electric flux through the cubical surface is

• 0

Tags

NGSS.HS-PS3-5

The electric field of two long coaxial cylinders is represented by lines of force as shown above. The charge on the inner cylinder is +Q. The charge on the outer cylinder is

• +3Q

• +2Q

• 0

• -2Q

• -3Q

Tags

NGSS.HS-PS2-4