Measurement and analysis of current and voltage in simple circuits allows us to formulate rules and predict unknown values.
Part ofPhysicsRevision guides: Electricity
An ohmmeter can be used to measure the resistance of a resistor
Alternatively, the resistor can be placed in a circuit and the voltage across it, and the current in the resistor can be measured.
Ohm’s law (\(R = \frac {V}{I}\)) can then be used to calculate the resistance of R.