Question

when the voltage applied across a bulb is 200 V, the current passing through the bulb is 0.1 A. Find the power of a bulb

Answer 1

Given,

$\pink{ \boxed{\boxed{\begin{array}{cc} \rm \to \: current \: \: I = 0.1 \: A \\ \\ \rm \to \: voltage \: \: V = 200 \: V\end{array}}}}$

We have to find :

• The power of the bulb = P

Solution :

$\orange{ \boxed{\boxed{\begin{array}{cc} \sf \: we \: know \: that \: : \\ \\ \rm \: power \: (P) = voltage(V) \times current(I) \\ \\ \rm \implies \:P = VI \\ \\ \rm \implies \:P = 200 \times 0.1 \\ \\ \rm \implies \: P = 200 \times \frac{1}{10} \\ \\ \rm \implies \: P = 20 \: W \: \\ \\ \pink{ \boxed{\therefore \: \sf \: power \: of \: the \: bulb \:, P = 20 \: W}} \\ \\ \end{array}}}}$