Lesson Worksheet: Electric Current Science

In this worksheet, we will practice describing what an electric current is and determining the direction of an electric current in a circuit.

Q1:

Complete the following sentence: When a wire has an electric current in it, are moving along the wire.

  • Athe nuclei of atoms
  • Belectrons
  • Catoms

Q2:

Complete the following sentence: The conventional current in a wire is in the the flow of electrons in the wire.

  • Aopposite direction to
  • Bsame direction as

Q3:

The picture shows the circuit symbol for a cell.

Which line represents the negative terminal of the cell?

  • AThe longer line
  • BThe shorter line

Q4:

The diagram shows an electric circuit containing a cell and a bulb. This circuit is set up on a workbench and left on for 1 hour.

At the end of the hour, are there more electrons, fewer electrons, or the same number of electrons in the wires of the circuit than at the start of the hour?

  • AThere are more electrons in the wires.
  • BThere are fewer electrons in the wires.
  • CThere are the same number of electrons in the wires.

Q5:

Complete the following sentence: In an electric circuit, electrons flow from the terminal of a cell to the terminal.

  • Anegative, positive
  • Bpositive, negative

Q6:

Which of the following is the unit of electric current?

  • AThe coulomb
  • BThe joule
  • CThe volt
  • DThe ampere
  • EThe watt

Q7:

The diagram shows an electric circuit containing a cell and a bulb. This circuit is set up on a workbench and left on for 1 hour.

Over the course of the hour, the bulb gradually becomes dimmer. Which of the following statements correctly explains why?

  • AThe number of electrons in the cell decreases over time, so there are fewer electrons that can flow around the circuit.
  • BThe amount of energy in the cell decreases over time, so there is less energy that can be converted into light by the bulb.

Q8:

The picture below shows the electrons and atomic nuclei in a section of copper wire. The blue circles represent electrons and the red circles represent atomic nuclei. There is an electric current in the wire, and the electrons in it are moving to the right.

What is the direction of the conventional current in the wire?

  • ATo the right
  • BTo the left

Q9:

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.

When there is an electric current in the wire, do the electrons move along the wire?

  • ANo
  • BYes

When there is an electric current in the wire, do the atomic nuclei move along the wire?

  • AYes
  • BNo

Q10:

Which of the following is the correct symbol for amperes?

  • Ai
  • BI
  • Ca
  • DA
  • EV

This lesson includes 16 additional questions for subscribers.

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