Joule’s Law

Summary:

Joule’s Law states that the heat generated in an electric wire is proportional to the current, resistance, and time. When an electric current flows through a wire, the interaction between electrons and particles of the wire produces heat. The law can be represented numerically in different scenarios.

In the first scenario, when the time and resistance of the wire are constant, the heat produced is proportional to the square of the current flowing through the wire. In the second scenario, when the time and current are constant, the heat produced is proportional to the resistance of the wire. In the third scenario, when the resistance and current are constant, the heat produced is proportional to the current flow time.

The equation that combines all these scenarios is H = i^2Rt/J, where H represents the heat generated, i is current, R is the resistance, t is the time, and J is Joule’s constant.

Joule’s constant, J, is defined as the number of work units that produce one heat unit when converted completely. Its value is 4.2 joules/cal.

The power in an electric circuit, the rate at which work is done, or energy is converted, can be calculated using P = V^2/R, where P is the power, V is the voltage, and R is the resistance. The SI unit of electrical power is watts (W).

Excerpt:

Joule’s Law

What is Joule’s Law?
How much heat is delivered inside an electric wire because the flow progression is communicated in the unit of Joules? At the point when the ongoing courses through the wire, there is an impact among electrons and particles of the wire, which prompts the age of intensity. Joule’s Law expresses that when a current flows in a conductor, how much heat is created is relative to current, resistance, and time in the ongoing streaming. Allow us to view the idea driving the joule’s law.

Numerical Representation of Joule’s Law
At the point when in a current conducting wire, the hour of the streaming of current and the resistance of the wire is steady, how much intensity is delivered and the square of how much current streaming the wire corresponds to one another.