Question

What is joule's law of heating ? explain what do you
understand by power rating of an electical instruiritet? 02​

Answer 1

Explanation:

Joule's law of heating states that heat produced in joules when a current of I amperes flows in a wire of resistance R ohms for time t seconds is given by H = I 2Rt. Thus the heat produced in a wire is directly proportional to: (i) Square of current. (ii) Resistance of wire.

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Answer 2

Answer:

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.

Power rating of electric appliance can be explain by an example: An electric bulb is rated as hundred watt - 220 volt. It means that if the bulb is lighted on 220 volt supply the electric power consumed by it is hundred watt . ... ii The safe limit of current which can flow through the bulb while in use .

Explanation:

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