What is Ohm's law in physics?
In physics, Ohm's law refers to the relationship stating that voltage equals current times resistance in a conductor. It matters because the same idea reappears across many later topics, so building a clear mental picture of it early saves a lot of time.
How to approach it step by step
To work with Ohm's law confidently, identify the series and parallel parts of the circuit, reduce them stepwise, then apply V = IR. LetMeTeach draws this out live on screen while explaining it aloud, so you watch each part appear instead of decoding a static block of text. You can interrupt at any point and ask for the same idea again in simpler words, in another language, or with a different example.
Worked example
A 12 V supply across 4 Ω gives a current of 3 A.
The mistake most learners make
Using the same current for parallel branches, where the voltage is shared instead.
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