Electric Fields & Electric Potential Energy

A positive charge is placed a short distance from a negative charge of equal magnitude. Which of the following diagrams best represents the electric field around the charges?

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Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-5

An ⍺ particle and a uranium nucleus are separated by a distance of 1.0 x 10^-13 m. The charge on an ⍺ particle is 3.2 x 10^-19 C and that on a uranium nucleus is 1.5 x 10^-17 C. Which of the following is the electrostatic force between them when they are in a vacuum? (k=9 x10⁹ Nm²/C)

• 4.3 x 10^-20 N

• 4.3 x 10^-13 N

• 4.32 N

• 4.3 x 10¹⁰ N

A pair of horizontal conducting plates are placed close to one another. The upper plate is given a negative charge while the lower one is earthed.

Which of the following diagrams correctly illustrates the electric field and distribution of charges on the plates?

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Tags

NGSS.HS-PS2-4

The given diagram shows two charged metal plates between which an electric field exists.

Which graph best shows how the electric field strength E varies with distance from X along the line XY?

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The given diagram shows four possible paths through an electric field.

Which path represents a possible movement of an electron in the field?

• A

• B

• C

• D

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-5

Which charges particle has the larger electric field applied to it?

• A

• B

• same for both

• can not be determined

A point charge Q is far from all other charges. At a distance of 2 m from Q, the electric field is 20 N/C. What is the force a charge of 5 Coulombs feels?

• 4 N
• 100 N
• 40 N
• 10 N

An electrostatic force of 2 X 10² N is exerted on a charge of 4 C at point P in an electric field. The magnitude of the electric field intensity at P is

• 8 X 10² N/C

• 5 N/C

• 2 X 10^-2 N/C

• 50 N/C

The Affect of Electric fields surrounding particles become stronger the _______________ they are from each other.

• Farther

• Closer

What does the Law of Conservation of Charge state?

• like charges repel and opposites attract

• positive charge fields point away from a charge; negative points toward

• charges cannot be created nor destroyed, can only be transferred from one body to the other.