Worksheet: Electric Fields

In this worksheet, we will practice interpreting diagrams of electric field lines and relating how the field lines are drawn to the strength and direction of the electric field.

Q1:

Which diagram correctly shows the electric field lines of a negative charge that is not moving?

  • A(c)
  • B(b)
  • C(d)
  • D(a)

Q2:

The diagram shows two charged parallel plates. Red represents positive charge and blue represents negative charge. If a particle with a charge of 3 mC is placed at point 𝑃 , which plate will it move toward?

  • AThe negative plate
  • BThe positive plate

Q3:

The diagram shows the electric field produced by two parallel charged plates.

If a particle with a positive electric charge is placed at point 𝑃 , in which direction will it move?

  • ATo the right
  • BUpward
  • CTo the left
  • DDownward

If a particle with a negative electric charge is placed at point 𝑆 , in which direction will it move?

  • ATo the left
  • BTo the right
  • CDownward
  • DUpward

Q4:

The diagram shows the electric field created by a pair of parallel charged plates. The red plate represents the positively charged plate and the blue plate represents the negatively charged plate. At which of the points 𝑃 , 𝑅 , or 𝑆 is the electric field strongest?

  • A 𝑅
  • B 𝑃
  • C 𝑆
  • DThe electric field has the same strength at each point.

Q5:

Imagine 2 wide flat sheets of metal that are close to each other. One is positively charged and the other is negatively charged. Which of the diagrams correctly shows the field lines of the electric field between the two sheets of metal? Red represents the positive charge and blue represents the negative charge.

  • A(b)
  • B(a)
  • C(c)
  • D(d)

Q6:

Imagine a very wide flat sheet of metal that has a net negative charge. Which of the diagrams correctly shows the field lines for the electric field above the sheet of metal?

  • A(b)
  • B(a)
  • C(c)
  • D(d)

Q7:

Imagine a very wide flat sheet of metal that has a net positive electric charge. Which of the diagrams correctly shows the field lines for the electric field above the sheet of metal?

  • A
  • B
  • C
  • D

Q8:

The diagram shows the electric field produced by a negatively charged metal sphere. If a positively charged particle is placed at the point 𝑃 , in which direction will it move?

  • AToward point 𝑅
  • BAway from the metal sphere
  • CToward point 𝑆
  • DToward the metal sphere
  • EAway from point 𝑅

Q9:

The diagram shows the electric field around a charge. At which point on the diagram, P, R, or S, is the electric field strongest?

  • AS
  • BP
  • CR

Q10:

The diagram shows the electric fields around two point charges that are not moving. Which charge has the greater magnitude?

  • A(b)
  • B(a)

Q11:

The diagram shows the electric field lines of two point charges that are close to each other. Does the diagram show two equal charges or two opposite charges?

  • ATwo equal charges
  • BTwo opposite charges

Q12:

Which diagram correctly shows the electric field lines of a positive charge that is not moving?

  • A(b)
  • B(a)
  • C(c)
  • D(d)

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