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Derive expression for joules law std10 |
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Answer» Expression for joules law of heating is given below The amount of work done when an electric charges, move against a potential difference which is denoted by V is given by; W=V x Q …….. (1) From the above expression, V=W/Q We KNOW that, V=IR …….. (2) Q=It……… (3) Therefore, I=Q/t Let us substitute (2) and (3) in (1) we get, W=(IR)(It) \mathrm{W}=\mathrm{l}^{2} \mathrm{RT}W=l2RT W=H Where H is the amount of heat produced, it is expressed in Joules J and I is expressed in terms of Ampere. Therefore, \bold{\mathrm{H}=\mathrm{l}^{2} \mathrm{RT}}H=l2RT Some of the examples of heating with the electric current are as follows: 1) Heaters 2) Geyser pls mark brainliest |
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