The most important law related to electrical circuits and is consequently needed for almost every electricity exam question!
Key Concepts
Substituting the proportional sign, we end up with an equation for resistance:
\(V \propto I\)
\(V=RI\)
The following results show an example of a non-Ohmic conductor:
Use quizzes to practise application of theory.
START QUIZ!
The diagram is from the PhET simulation.
The Resistance is:
R = V/I = 9/0.02 = 450 Ω
The PD across a 200 Ω resistor is 8 V.
The current flowing through the resistor is:
I = V/R = 8/200 = 40 mA
The unit for resistance is the ohm, which of the following is an alternative unit
R = V/I
What is the resistance of R in the circuit shown (EMF of the battery is 10 V)
R = V/I = 5/0.5 = 10 Ω
How much of Ohm's law have you understood?
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