General information and resources for students and adult learners.

OHM's Law

George Simon Ohm (1787-1854) gave his name to the unit of electrical resistance, the ohm and the law of electric current, Ohm's Law. Ohm, a German, linked his name with those of Ampere, and Volta, in formulating his famous law, which states that electric current is directly proportional to electromotive force and inversely to resistance; or expressed in the familiar equation: electromotive force (in volts) = current (in amperes) x resistance (in ohms).

Despite Ohm's great contribution to electrodynamics, you will rarely see his name on a piece of electrical equipment, along with Ampere, Volta and Watt.  The resistor (or resistance), a device used in electrical circuits, is marked in ohms, but by means of a color code (black, brown, red, orange, yellow, green, blue, violet, grey and white representing the numbers 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9 respectively.)  


No comments:

Popular Posts


What is your learning style?

Belling the Cat

Belling the Cat
"I will say that the plan of the young Mouse is very good. But let me ask one question: Who will bell the Cat?"

Blog Archive