Resistors

Question 1

Why would you need to use a resistor?

Answer 1

To dim a lamp in a circuit

Question 2

How to calculate resistance

Answer 2

Potential difference divided by current

Question 3

What would happen to the current flowing through the resistor if we increased the potential difference

Answer 3

Current through a resistor is directly proportional to the potential difference, if the pd was 10, the current would be 0.1, if the pd was 20, the current would be 0.2 etc

Question 4

What does this result tell us about the resistance

Answer 4

The resistance is constant and doesn’t change even if we increase the current

Question 5

What kind of resistor is this

Answer 5

An ohmic conductor

Question 6

What’s a key fact about resistance

Answer 6

The resistance will only stay constant if the temperature is constant.