What does ohm's law depend on?

Answer 1

The law applies to all temperatures, even when the material properties change with temperature; the temperature characteristics of the material are assigned to the resistance, so that the law still holds.

Answer

The original answer isn't quite correct.

As temperature affects resistivity, the resistance of a conductor may change if its temperature is allowed to increase. For pure metal conductors, the resistance generally increases as the temperature increases.

Ohm's Law ('the current flowing along a conductor, at constant temperature, is directly proportional to the potential difference across that conductor') only applies when the resistance of the conductor is constant so, when verifying Ohm's Law, the temperature must be kept constant, in order to keep the resistance constant.

It should be pointed out that the ratio of voltage (U) to current (R) is called resistance (R), and the resistance of a circuit can be found from the equation, R = U/I whether Ohm's Law applies or not -but Ohm's Law itself only applies when the ratio is constant over a range of voltage variation.

Read more: What_is_the_significance_of_the_constant_temperature_reference_in_ohms_law

Answer 2

Ohm's Law uses the following formulas: E=IxR I=E/R R=E/I Where: E=Voltage; I=Current; R=Resistance

Answer 3

According to Ohm's law, if the temperature increases,resistance increases.