Simple Circuits Quiz

A student builds a circuit that lights a lightbulb. A second bulb is added to the same loop between the first bulb and the battery. Which statement describes the brightness of each bulb?

• Each bulb will be as bright as the first bulb was.

• The first bulb will be the same brightness, and the second bulb will be dimmer.

• The first bulb will be dimmer than it was, and the second bulb will not light.

• Each bulb will be dimmer than the first bulb was.

The images show two steps in a procedure a student used to examine an electric circuit. Which question might the student be investigating?

• How does changing the voltage affect the brightness of a light bulb?

• Is a light bulb an electric insulator or an electric conductor?

• How does an open circuit compare with a closed circuit?

• Is more energy transformed in an electric circuit in a light bulb or in a wire?

Which statement best describes an electric current?

• The measurement of the electric potential energy in a circuit.

• Type of conductor or insulator.

• Charged particles move through a conductor.

• Energy transfers inside of an electric device.

Which conditions would prevent an electric current in a circuit and stop any energy transfer from happening?

• disconnecting a wire

• opening a switch

• removing the battery

• adding a second battery

The circuit in the diagram is closed, so charge particles travel through the wires and light the bulbs.

• False

• True

Adding which object to a circuit will create a potential energy difference in a circuit?

• switch

• wire

• battery

• light bulb

An electric current occurs in a circuit because negatively charged particles are repelled by negatively charged particles in a battery.

• True

• False

A light bulb is powered by a single D-cell. What happens if two D-cells connected end-to-end are used?

• The light bulb burns brighter because the current will be larger.

• The light bulb burns brighter because the current will be smaller.

• The light bulb burns dimmer because the current will be larger.

• The light bulb burns dimmer because the current will be smaller.

An electric __ is the movement of electrically charged particles.

• resistance

• voltage

• current

• conductor