Simple Circuits Review questions

1) 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.  Choose the correct  statement which describes the brightness of each bulb?

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

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

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

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

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

• a switch 

• a wire 

• a light bulb 

• a battery

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

• True

• False

Use the diagram to answer the following questions.

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? 

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

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

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

Which statement best describes an electric current? 

• Energy transfers inside of an electric device

• Charged particles move through a conductor.

• Type of conductor or insulator. 

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

What the basic components of simple circuit ?

• A. What the basic components of simple circuit ?

• B. A motor, light bulb , electrical conductors, and a switch.

• C. A switch, source, electrical connectors and an electrical device.

• D. There's no simple circuits only complex.

What is the scientific definition for electricity?

• A

  Electricity is the flow of current.

• B

  Electricity is movement of negatively charged particles only.

• C

  Electricity is movement of positively charged particles only.

• D

  Electricity is the flow of charged particles both positive and negative.

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

• A. True

• B. False

Which statement best describes an electric current? 

• A

  Energy transfers inside of an electric device. 

• B

  Charged particles move through a conductor.

• C

  Type of conductor or insulator. 

• D

  The measurement of the electric potential energy in a circuit.