Question

an electric bulb is rated 220v and 100w find the current consumed by it when it is operated in 110v​

Answer 1

Answer:-

• Potential Difference=V=110V
• Power=P=100w
• Current=I=?

We know that

$\boxed{\sf P=VI}$

$\\ \qquad\quad\sf\Rrightarrow I=\dfrac{P}{V}$

$\\ \qquad\quad\sf\Rrightarrow I=\dfrac{100}{110}$

$\\ \qquad\quad\sf\Rrightarrow I=0.9A$

Note:-

SI unit of Current is Ampere(A)