Lesson 5 - Voltage

Question 1

What is voltage?

Answer 1

Voltage is a measurement of the size of a ‘push’ that causes the current to flow in a circuit. Voltage is what makes the charges move.

Question 2

What does the voltage across a cell tell you about?

Answer 2

It tells you the size of the force that will be placed on the charges in a circuit. It can also tell you about how much energy can be transferred to the components in the circuit by the charges.

Question 3

What can you do to the voltage to make the bulb brighter?

Answer 3

You can increase it

Question 4

If you add another bulb to a circuit, what will happen to the current? How will you make it the same brightness as it was with 1 bulb?

Answer 4

It will make the current smaller. This is because it is harder to push current through 2 bulbs than 1. To make it the same brightness as one bulb, you would have to increase the voltage.