Ohm's law
Leaving Cert Physics · Electricity and Magnetism
Higher Level
The current flowing through a metallic conductor kept at constant temperature is directly proportional to the potential difference across it. A conductor that obeys it gives a straight line through the origin on a graph of current against potential difference.
Ordinary Level
The current in a metal conductor at constant temperature is directly proportional to the potential difference across it.
Physics practice is part of Pro. Reading the definitions here is always free.
More Electricity and Magnetism terms
Get the free study guide
H1 Owl is now on the App Store: download it for iPhone. Sign up here and get The Leaving Cert Maths Game Plan, our free PDF study guide, straight away, plus occasional study tips.
Occasional emails, no spam. Under 16? Ask a parent to sign up for you.
Where next
All Physics terms
The whole Leaving Cert Physics glossary, grouped by strand and labelled by level.
Browse PhysicsQuestion of the day
One real Higher Level Maths question, new every day, with the explanation.
Answer today'sThe app
1,700+ original questions across Maths, Biology, Chemistry and Physics. Maths is free.
See the app