Question

1 watt of electric power is equivalent to ___.

• A. $1A^3\Omega$
• B. $1A\Omega$
• C. $1A^2\Omega$
• D. $1A^4\Omega$

Answer 1

The correct option is C $1A^2\Omega$

Electric power $P$ = $VI=I^{2}R$ (as $V=IR$ from ohm's law) where, $I$ is the current, $V$ is the voltage and $R$ is the resistance.

Unit of power is watt $\left(W\right)$
Unit of current is ampere $\left(A\right)$
Units of resistance is ohm ($\Omega$)

Hence, $1watt=1A^2\Omega$