(a).Write joule's law of heating. (b).Two …

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(a).Write joule's law of heating. (b).Two lamps,one rated 100 W; 220V,and the other 60W;220V,are connected in parallel to electric mains supply,Find the current drawn by two bullbs from the line,if the supply voltage is 220V.

Posted by Bharat Choudhary 5 years, 8 months ago

CBSE > Class 10 > Science

1 answers

Meghna Thapar 5 years, 8 months ago

The effect of electric current due to which heat is produced in a conductor, when current passes through it, is called the heating effect of electric current.

The total work (W) done by the current in an electric circuit is called electric energy and is given as

W = VIt = I²Rt

W = V² t /R

This energy is exhibited as heat. Thus, we have H = VIt = I2Rt.

This is called Joule’s Law of Heating, which states that the heat produced in a resistor is directly proportional to the Square of the current in the resistor, Resistance of the resistor, Time for which the current flows through the resistance

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Posted by Pandey Ji 4 months, 2 weeks ago

CBSE > Class 10 > Science