Question

The power rating of an electrical appliance is given by ______. (symbols have their usual meanings)

Options

• IV

• I² V

• I²R

• V²R

Answer 1

The power rating of an electrical appliance is given by IV.

Explanation:

Electric power is P = VI, where V is voltage and I is current. I²V has wrong units and is not a power formula. I²R and V²R are not correct forms; the correct ones are `1I^2R and V^2/R`.