Electric Field and Potential

Electric Field and Potential

Multiple Choice

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?

Multiple Choice

Which diagram best represents the electric field around a negatively charged conducting sphere?

Multiple Choice

Identical charges A, B, and C are located between two oppositely charged parallel plates, as shown in the diagram below. The magnitude of the force exerted on the charges by the electric field between the plates is

• least on A and greatest on C

• the same on A and C, but less on B

• the same for A, B, and C

• greatest on A and least on C

Multiple Choice

Electric potential ____________ as distance increases.

• Increases

• Decreases

• Remains Constant

• Is 0

Multiple Choice

At which point is the electric field the weakest?

• A because it is the furthest away
• A because the field lines are further apart
• C because the field lines are further apart
• C  because it is the furthest away

Multiple Choice

Q_A and Q_B are two charges creating an electric field. Based on the electric field lines, we can conclude

• Q_A and Q_B are both positive
• Q_A and Q_B are both negative
• Q_A is positive and Q_B is negative
• Q_A is negative and Q_B is positive

Multiple Choice

When a charge of 3 C is moved from infinity to a point X in an electric field, the work done is 15 J. What is the electric potential at X?

• 45 V

• 22.5 V

• 15 V

• 5 V

Multiple Choice

Which diagram represents the electric fields of a negative point charge, shown by º

Multiple Choice

How do electric field lines represent the magnitude of an electric field?

• Length of the line
• With arrows
• Density of lines
• Width of lines

Multiple Choice

In what direction will a negatively charged particle accelerate in an electric field?

• In the same direction as field
• In opposite direction as field
• Perpendicular to field
• Impossible to tell

Multiple Choice

1 Volt is equivalent to what units?

• 1 N/C
• 1 kgm/s
• 1 J/C
• 1 N/m

Multiple Choice

The electric field surrounding a positively charged object is

• Away from the charge
• Toward the charge

Multiple Choice

At which point is the electric field the strongest

• A
• B
• C
• D