Kirchhoff's Rules and Circuits

This circuit has 3 lightbulbs and a bell. Which procedure will result in only the blue lightbulbs operating?

• Close switches 1 and 2 and leave Switch 3 open

• Close Switch 3 and leave Switches 1 and 2 open

• Close Switches 2 and 3 and leave Switch 1 open

• Close Switch 2 and leave Switches 1 and 3 open

Tags

NGSS.MS-ETS1-1

Which procedure would most likely allow the bulbs to light?

• Open the switch and then connect the two wires that are attached to the wood block

• Switch the positions of the two wires that are connected to the battery and then open the switch

• Move the switch closer in the circuit to the battery

• Connect the two wires that are attached to the wood block

Tags

NGSS.MS-ETS1-2

A string of lights with small bulbs is shown below. The bulbs are connected by wire that is covered with an insulator.

When the lights are on, electricity travels in ---

• a complete circuit

• a sound wave

• a light ray

• an incomplete path

Tags

NGSS.MS-PS3-5

Look at the image. What will happen if Switch 3 is closed and the other switches are left open?

• Only the white bulb will operate

• None of the bulbs will operate

• Only the white and yellow bulbs will operate

• Only the red and blue bulbs will operate

Tags

NGSS.4-PS3-2

Which of these describes one thing that could happen if the wire in a car fuse burns out?

• The car's lights will burn brighter

• The car's radio will not work

• The car's turn signal will blink too slowly.

• The car's power windows will open faster

The lightbulb does not glow. Which statement explains this observation?

• The battery is not charged

• The lightbulb is not part of a complete circuit

• The circuit does not have a switch

• The bell uses most of the energy from the battery

Which of these changes to the electric circuit shown above will cause the lightbulb to light up?

• Straightening the wire so that the current can flow more easily.

• Adding a switch and more wire so that the current can flow more easily

• Turning one battery so that its positive end connects to the other battery's negative end

• Making the length of wire the same on both sides of the lightbulb

Tags

NGSS.3-5-ETS1-2

NGSS.4-PS3-2

Which of the following statements is true?

• Electricity cannot be transported

• Electricity flows in a circuit with gaps.

• A cell converts chemical energy to electrical energy.

• A cell consists of three terminals.

Tags

NGSS.MS-PS3-5

Why is a switch used in a circuit?

• a. To save energy

• b. To complete or break a circuit

• c. To prevent electric shocks

• d. To make the bulb glow easily

Which of the following is a correct statement of Kirchhoff's Junction Rule?

• The total current entering a junction equals the total current leaving the junction.

• The total voltage around a closed loop is zero.

• The total resistance in a series circuit is the sum of individual resistances.

• The total power in a circuit is the product of current and voltage.