Ohm’s law and resistance

Question 1

What does Ohm’s law state?

Answer 1

Ohm’s law states how the current through a component relates to its resistance and the potential difference across it.

Question 2

What is resistance?

Answer 2

The resistance of a component is a way of measuring how hard it is for electricity to flow through it. Unit= ohms

Question 3

What does the resistance of the whole circuit depend on?

Answer 3

The resistance of the different components in the circuit. The higher the total resistance, the smaller the current.

Question 4

How can the resistance be changed?

Answer 4

By putting different resistors into the circuits, or by using a variable resistor. The resistance of a variable resistor can be changed using a slider or knob.