Question

7. Define electric power. Express it in terms of potential difference V and
resistance R.
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Answer 1

Answer:

general definition of power is “ it is the the capacity to do something in a particular way ”

but in physics , “it is the rate of energy consumed with respect to time.”

now you can say, “electric power is the rate at which electrical energy consumed in a electric circuit. ”

i.e., electric power = electrical energy consumed/time taken to consumed energy.

from Joule law,

electrical energy/heat consumed during time t = i²Rt

so, electric power = i²Rt/t = i²R

from ohm's law, V = iR

so, electric power = (V/R)²R = V²/R

hence, electric power in term of V and R is given by, P = V²/R

Explanation: