Question

Write Ohm's law. Explain the 1—V characteristics for a conductor obeying Ohm's law.

Answer 1

At a constant temperature the potential difference between two ends of a conductor through which electric current is passing is directly proportional to the current flowing through it.

V = IR

When resistance and current is 1 unit then the potential difference is 1V.

V = 1 A × 1 Ohm

V = 1V .

Answer 2

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According to Ohm's law,

Current flowing in a conductor is directly proportional to the potential difference applied across to its ends at constant temperature & physical conditions.

So, According to the definition

V ∝ I

V/I = constant

Put the constant as “r” which indicates the resistance of the conductor.

R = V/I

V = IR

Where

I = current flowing in the conductor

V = potential difference applied across the conductor

R = resistance of the conductor

Unit of Resistance is called omega (Ω)