Two electric bulbs have ratings respectively of ${\rm{25}}\,\,{\rm{W, 220}}\,\,{\rm{V}}$ and ${\rm{100}}\,\,{\rm{W, 220}}\,\,{\rm{V}}$. If the bulbs are connected in series with a supply of ${\rm{440}}$, which bulb will fuse?

$\begin{array}{*{20}{l}} {{\rm{25}}\,\,{\rm{W\,\, bulb}}} \end{array}$

$\begin{array}{*{20}{l}} {{\rm{100}}\,\,{\rm{W\,\, bulb}}} \end{array}$

JEE PHYSICS MCQ: CURRENT ELECTRICITY

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Two electric bulbs have ratings respectively of

\mathrm{25}\,\,\mathrm{W, 220}\,\,\mathrm{V}

and

\mathrm{100}\,\,\mathrm{W, 220}\,\,\mathrm{V}

. If the bulbs are connected in series with a supply of

\mathrm{440}

, which bulb will fuse?

View answer and explanation

Correct option: A

\begin{array}{llllllllllllllllllll} {\mathrm{25}\,\,\mathrm{W\,\, bulb}} \end{array}

Option A (25 W bulb) is correct because the current flowing through the series circuit exceeds the safe current for the 25 W bulb, causing it to fuse.

JEE PHYSICS MCQ: CURRENT ELECTRICITY

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