Question

what do you mean by joules law of heating​

Answer 1

Joule’s law of heating states that,

"when a current ‘i ' passes through a conductor of resistance ‘r’ for time ‘t’ then the heat developed in the conductor is equal to the product of the square of the current, the resistance and time."

Joule's Law is Represented Mathematically by the Following Equation

1. The heat produced in a conductor due to the flow of electric current through it varies directly as the square of the magnitude of current when the resistance offered by the conductor and the time of flow of electrical current is constant.

H ∝ i²

i.e H ∝ i² (When R and t are constant)

2. The amount of heat produced in a conductor due to the flow of electric current through it is directly proportional to the resistance offered by the conductor when the time of flow and the magnitude of the current is constant.

i.e H ∝ R (When i and t are constant)

3. The heat produced in a conductor due to the flow of current is directly proportional to the time duration of current flow when the electrical resistance and the magnitude of current are constant.

i.e H ∝ t (When i and t are constant)

If these three conditions are merged, the resulting generalized formula is given by

H ∝ i².R.t

When i, R and t all are variable

$\: \:H = \frac{1}{j} i².R.t$

∵J is a Joule constant.

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Answer 2

Answer:

Joules law of heating states that when a current ' i ' passes though a conductor of residence ' r ' for time ' t ' then the heat development in the conduter is equal to the product of the square of the current, the resistance and time .

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