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For an electrical conductor, by Ohm`s law:

If V = Voltage across its ends ,
R= resistance offered to current flow
and I = Current flowing through it , then

1. V is directly proportional to I.

2. The ratio V/I is constant and equal to R.
If I = 2 Amperes and V = 20 volts then
R = 20/2 = 10 ohms.
by Jai Shri Ram May 30, 2005
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