# the value of the resistor [closed]

what does the value of resistance indicates ? On what basis the value of resistance is assigned to a resistor ? How manufacturers are assigning value to the resistor? Is it on the basis of how much amount of current to be flown in a circuit?

## closed as unclear what you're asking by DerStrom8, Martin, Olin Lathrop, Leon Heller, brhansFeb 14 '18 at 13:22

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• Look up Ohm's Law for one thing. Resistance isn't "assigned". It is intrinsic to all materials. – DerStrom8 Feb 14 '18 at 12:54
• Resistance is a property which exists in all materials. It depends on resistivity, length and cross-sectional area of the material. In Wikipedia, search for resistivity and resistance. – Mitu Raj Feb 14 '18 at 13:07

By resistance you are actually talking about the Ohmic Resistance of something.

This value was first described by Georg Simon Ohm in a scientific paper called The Galvanic Circuit Investigated Mathematically.

In that paper Georg defined Resistance $R$ as a value that relates the amount of current $I$ that passes through the device or wire when a given voltage $V$ is applied across it.

That is:

$R = V/I$

Part of that paper was later established as Ohm's Law by James Clerk Maxwel

Since the value of resistance itself is defined by that very equation, it is clear that resistance dictates the current in a circuit for linear devices.