Question

plzzzzz answerrrrre​

Answer 1

$\huge{\boxed{\bf{\red{Given }}}}$

• An electric bulb rated 220V and 50W. when it is operated on 110 volt

$\huge{\boxed{\bf{\green{To \: Find}}}}$

• what will be the power consumed ?

$\huge{\boxed{\bf{\purple{Solution}}}}$

Here we have,

• $\bf P_{b} \ = \ 50W$
• $\bf V_{b} \ = \ 220V$

➦ R = $\dfrac{V^2}{P}$

➦ $\dfrac{220 \ \times \ 220}{50}$

➦ 968Ω

➦ Power = $\dfrac{V^2}{R}$

➦ $\dfrac{110 \ \times \ 110}{968}$

➦ $\bf \dfrac{25}{2}$

$\therefore \:\:\bf\orange{The \ consumed \ power \ = \ \dfrac{25}{2} }$Ω

Answer 2

$\bf\huge {ANSWER}$

Given ,

→ V = 220 V

→ P = 50 W

Resistance of the bulb ,

                        $\rm R = \dfrac{V^2}{P}$

                            $\rm = \dfrac{220\times220}{50}$

                            $\rm = 968 \ ohm$

___________________________________________________________

When , V = 110 V

$\rm \longrightarrow P=\dfrac{V^2}{R}$

        $\rm = \dfrac{110\times110}{968}$

        $\rm \bf = 12.5 \ W$

       

HOPE IT HELPS U .............