Physics

Problem

Answer the following questions related to electrical power and energy: a. (i) Define electrical power and write its SI unit. b. (ii) Write the mathematical relation connecting electrical energy

W

, power

P

and time

t

. c. (iii) Show, by direct calculation, that

1\,\text{kWh}

of electrical energy is equal to

3.6\times10^{6}\,\text{J}

. State every step clearly.

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