Which of the following does NOT describe how an electric circuit can be used to produce thermal energy?

• A.

  As electrical energy travels through a closed circuit, the battery begins to heat up.

• If a light bulb is turned on in an electric circuit, the bulb will start to heat up.

• As electrical energy travels through a closed circuit, the copper wires begin to heat up.

• If a light bulb is turned off in an electric circuit, the bulb will start to heat up.

In recent decades, LED (light-emitting diode) light bulbs have gained popularity over traditional light bulbs. The newer technology that is  used in LED light bulbs does not produce nearly as much thermal energy as that of traditional light bulbs. How could this be beneficial?

• The bulbs are safer to use because they do not become as hot to the touch.

• The bulbs cannot be used as a good source of heat to a plant or an animal that requires an indoor heat source.

• The bulbs last longer because they are not wasting as much energy (lost through the thermal energy that is given off).

• Both A and C are correct.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-3

Some appliances, like toasters, need to be plugged in to an electric outlet in the wall to provide a source of electrical energy and close the circuit so that electricity can flow through and the appliances can function. Other devices, like cell phones, do not need to be plugged in to the wall, but they still require a source of electrical energy to produce light and other types of energy in a closed circuit. What provides the source of electrical energy in devices like these?

• A battery

• Wires inside the cell phone

• The buttons on the side of the cell phone

• The screen on a cell phone collecting energy from the Sun and changing it to electrical energy

The image provided shows an attempt at creating a functioning electric circuit. In which of the numbered locations is there a problem that is preventing electrical energy from being able to flow through the circuit?

• 1

• 2

• 4

• 1 and 4

Tags

NGSS.MS-ETS1-1

NGSS.MS-PS2-3

Look at the image.

Part A

This circuit could function to produce which type(s) of energy?

Part B

What would need to change  this circuit for it to produce the type(s) of energy selected in Part A

Select two correct answers

• Light Energy

• Light and thermal energy

• Light, Thermal, and sound energy

• The light bulb would need to be replaced.

• The  switch would need to be closed.

Which of the following are true about this closed circuit that contains wires, a battery, and a buzzer? Choose TWO answers

• The battery is the energy source.

• The buzzer is the energy source.

• The battery is the output device.

• The buzzer is the output device.

• The wires are the energy source

Which of the following diagrams shows a closed circuit?

• 
• 
• 
• None of the above

Why does a light turn off when you flip a light switch?

• Electrical current cannot flow through an open circuit.

• Electrical current flows through an open circuit.

• Electrical current cannot flow through a closed circuit.

• The bulb is broken so current cannot flow through the circuit.

This question has two parts. First, answer Part A. Then answer Part B.

Part A

Look at the picture of the circuit to the left. What is the best way to describe this circuit?

Part B

Which of the following would happen if the switch was removed from the circuit shown and the wires attached to the switch were then connected?

• Part A - open circuit

• Part A - series circuit

• Part B - The wires would get longer

• Part B - The light bulb would stay on

Tags

NGSS.MS-PS3-5

This question has two parts. First, answer Part A. Then answer Part B.

Part A

The illustration shows an electrical circuit. The circuit has a lightbulb, a battery, a wire, and a switch. Which of the following is the role of the wire in the circuit?

Select the correct answer

Part B

Which of the following is the role of the battery in the circuit?

Select the correct answer

• Part A - producing energy for the lightbulb

• Part A - carrying electrical energy to the lightbulb

• Part B - carrying electrical energy to the lightbulb

• Part B - producing energy for the lightbulb