Question

electric bulb rated 200V and 80W then what will be the consumption of power when it is operated on 110 V.....this is the question..so I wanted to ask that can I use the formula
"P= V×I"
instead of using
$p = \frac{v^{2} }{r}$
​

Answer 1

Answer:

yes,

P= V × I

= V × ( V/r)

= V^2 / r