Ohm’s law

Tutormate > CBSE Syllabus-Class 10th Physics > Ohm’s law

03 Electricity

OHM’S LAW

According to Ohm’s law, at constant temperature and physical conditions, the current flowing through a conductor is directly proportional to the potential difference across its ends.

$V α I V = R \times I \frac{V}{I} = R$

where, V is the potential difference measured across the conductor (in volts)
I is the current through the conductor (in amperes)
R is the constant of proportionality called resistance (in ohms)

POINTS TO BE INFERRED FROM OHM’S LAW

On doubling of the potential difference across the ends of a conductor e, the current flowing through it also gets doubled, and when the potential difference is halved, the current also gets halved.
On doubling of resistance, the current gets halved, and if the resistance is halved, the current gets doubled.
Ohm’s law relationship can be remembered using the Ohm’s magic triangle or magic VIR triangle to calculate all formulations of Ohm’s law.