# Lesson Worksheet: The Electric Potential Difference Provided by Cells Science

In this worksheet, we will practice calculating the potential difference provided by a cell based on the amount of work it does to separate charge.

Q1:

A cell does 1 joule of work to separate 1 coulomb of charge. What potential difference does this create across the terminals of the cell?

Q2:

The picture shows the electrons and atomic nuclei in a piece of material. The electrons cannot flow along this material. The blue circles represent the electrons and the red circles represent the atomic nuclei.

At which end of the material is there a buildup of electrons?

• AThe right-hand end
• BThe left-hand end

Fill in the blank: The buildup of electrons at one end of the material creates an along the piece of material.

• Aelectric potential difference
• Belectric current

Q3:

The diagram shows an electric circuit consisting of a cell and a bulb.

Which of the following statements is correct?

• AThe cell contains more negative charges than positive charges. The negative charges flow from the negative terminal around the circuit. Once the number of negative charges in the cell is equal to the number of positive charges, the cell can no longer produce a current.
• BThe cell contains the same number of positive and negative charges, but the material of the cell creates a buildup of negative charges on the negative terminal. This creates a potential difference across the circuit, which creates a current in it.

Q4:

A cell does 10 joules of work to separate 2 coulombs of charge. What potential difference does this create across the terminals of the cell?

Q5:

Which of the following terms refers to the potential difference provided by a cell in a circuit?

• AElectrostatic force
• BElectrochemical force
• CElectromotive force
• DElectromagnetic force

Q6:

The picture shows the electrons and atomic nuclei in a section of copper wire. The blue circles represent electrons and the red circles represent atomic nuclei.

At first, there is a buildup of electrons at the right-hand end of the wire. What will happen in the wire over time?

• AElectrons will move toward the left-hand end of the wire until they are spaced out evenly.
• BElectrons will stay where they are.
• CElectrons will move toward the right-hand end of the wire, increasing the separation of charge across the ends of the wire.

Q7:

A cell does 10 joules of work to separate 2.5 coulombs of charge. What potential difference does this create across the terminals of the cell?

Q8:

A cell does work in order to separate charge and create a potential difference across its terminals. Which of the following formulas correctly shows how the potential difference created across the terminals relates to the work done and to the amount of charge separated?

• A
• B
• C

Q9:

The picture shows a positive charge and a negative charge that are near each other. The charges are fixed in place and cannot move.

Complete the following sentence: The separation of the positive and negative charges creates an between them.

• Aelectric potential difference
• Belectric current

Q10:

The picture shows a Van de Graaff generator.

Fill in the blank: When the generator is turned on, charges build up on the large sphere.

• Apositive
• Bnegative

The small sphere is connected to the ground by a copper cable. It is brought closer to the large sphere, but no spark jumps between them.

Fill in the blank: The buildup of negative charges on the large sphere creates an between the large sphere and the small sphere.

• Aelectric current
• Belectric potential difference

This lesson includes 18 additional questions and 16 additional question variations for subscribers.