Question

what will be the current drawn by an electric bulb of 40 watt when it is connected to a source of 220 volt

Answer 1

P = VI
p = 40
I = ?
v= 220
I = 40/220

Answer 2

$Given{ </p><p>↦powerofbulb=40W</p><p>↦connectedwithasourceof220V</p><p>$

a

$</p><p>\red{\rm Find}\begin{cases} \rm\mapsto \pink{what \: current \: will \: be \: drawn = ? } \end{cases}$

$\gray{\rm Solution}</p><p>$

we, know that

$\underline{\boxed{\to\rm P = VI}}$

$\therefore\rm I = \frac{P}{V}$

where,

P = 40W

V = 220V

So,

$\leadsto\rm I = \frac{P}{V}$

$\leadsto\rm I = \frac{4\not{0}}{22\not{0}}$

$\leadsto\rm I = \frac{4}{22} = 0.18A$

Hence, the current drawn by an electric bulb of 40W when it is connected to a source of 220V is 0.18A