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CBSE Class 10 Answered

Derive an expression for Joule's  law of heating. 
Asked by riyamaths | 01 Jun, 2018, 09:25: AM
answered-by-expert Expert Answer
Work done in carrying a charge Q through a potential difference V is given as 

Also, Q =  I  t 

Using Ohm's law, V =  I R
W =  I2 Rt 
This work done in carrying the charge th rough the wire appears as the heat produced. i.e.,
H = V I t =  I2Rt.
this energy is dissipated as heat energy.
This relationship is also known as Joule's Law of Heating
Answered by Abhijeet Mishra | 05 Jun, 2018, 04:51: PM
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