mention joules law of heating
Answers
Answer:
Joule heating, also known as resistance heating (resistive heating) and Ohmic heating, is the process by which the passage of an electric current through a conductor produces heat.
Joule’s law, in electricity, mathematical description of the rate at which resistance in a circuit converts electric energy into heat energy. The English physicist James Prescott Joule discovered in 1840 that the amount of heat per second that develops in a wire carrying a current is proportional to the electrical resistance of the wire and the square of the current. He determined that the heat evolved per second is equivalent to the electric power absorbed, or the power loss.
A quantitative form of Joule’s law is that the heat evolved per second, or the electric power loss, P, equals the current I squared times the resistance R, or P = I^2R. The power P has units of watts, or joules per second, when the current is expressed in amperes and the resistance in ohms.
Explanation:
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Answer:
when the current flows through an electric circuit the collision between atoms and electrons in that wire causes heat to generate...the heat which is produced during the flow of current is expressed in the unit of joules...
Heat is directly proportional to the square of the current flowing,, electrical resistance and time