Question

We know that SI unit of electric power is watt. Which unit among the following represents electric power?

• A. $({\text{Ampere}}^3\times \text{Ohm})$
• B. $(\text{Ampere}\times \text{Ohm})$
• C. $({\text{Ampere}}^2\times \text{Ohm})$
• D. $(\text{Ampere}\times {\text{Ohm}}^2)$

Answer 1

The correct option is C

$({\text{Ampere}}^2\times \text{Ohm})$

Electric power $={\text{I}}^2\times \text{R}=({\text{Ampere}}^2\times \text{Ohm})$, where Ampere and Ohm are the S.I units of current and resistance respectively.