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Question

FROM OHM' S LAW WRITE A BRIEF NOTE ON ELECTRICAL ENERGY AND POWER DESIPATED[ EXPRESSIONS FOR POWER ] IN AN ELECTRIC CIRCUIT

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Solution

from ohm's law we getV = IRPower dissipative is given by:P= VIP = IRRP = I2Rfrom the above expression we can see that, power dissipated across the any electric circuit is directly proportional to the resistance of the circuit.This formula is applicable when elements are connected in series.When and P = VVRP = V2RThis formula is applicable when elements are connected in parallel.energy is given by:E =power ×time E= I2RtThis formula is applicable when elements are connected in series.E =V2tR This formula is applicable when elements are connected in parallel.

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