Answer the following questions related to electrical power and energy:

PHYSICS · Multi-part · AP · Physics 2: Algebra-based · Electric Circuits · Electric Circuits

Problem

Answer the following questions related to electrical power and energy: (i) Define electrical power and write its SI unit. (ii) Write the mathematical relation connecting electrical energy WW, power PP and time tt. (iii) Show, by direct calculation, that 1 kWh1\,\text{kWh} of electrical energy is equal to 3.6×106 J3.6\times10^{6}\,\text{J}. State every step clearly.

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