Name the factors on which the heat produced in a wire depends when current is passed in it.

Question:

Name the factors on which the heat produced in a wire depends when current is passed in it.

Joule's Law Of Heating:

Joule's law of heating relates the heat dissipated by the conductor to the current passed through the conductor of some resistance and the time for which the current is passed in the conductor

Answer and Explanation:

For the expression of heat :

{eq}H=I^2Rt {/eq}

From joule's law of heating the heat dissipated by the conductor is dependent on certain factors which are:

  • Current passing from the conductor {eq}I {/eq}
  • Resistance of the conductor {eq}R {/eq}
  • Time for which the current is passed is {eq}t {/eq}

Since all the factors are directly proportional to the current, time and resistance hence with the increase in current, resistance and the time the heat dissipated will be increased.


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