What Is Voltage?

What happens to electric charges at room temperature?

• They move in a straight line.

• They move randomly.

• They do not move at all.

• They accumulate at one end of the wire.

What is required to create an electric current in a wire?

• A switch

• An external energy source

• A resistor

• A light bulb

In the water analogy used in the video, what does the water at the top of the hill represent?

• Charges that are at rest.

• Charges with low potential energy.

• Charges with high potential energy.

• Resistors in the circuit.

What is the term used to describe the difference in potential energy between two points?

• Current

• Voltage

• Resistance

• Energy

According to the video, what happens when resistance is greater in a circuit?

• The current flow decreases.

• The current flow increases.

• The voltage increases.

• The voltage becomes zero.