Fifty electric bulbs, all identical, are connected in series across the mains of a ${\rm{220}}\,\,{\rm{V}}$ supply. After one bulb is fused, the remaining ${\rm{49}}$ bulbs connected in series across the same mains. The illumination will be

More with ${\rm{50}}$ bulbs than with 48 bulbs

More with ${\rm{49}}$ bulbs than with 50 bulbs

NEET UG PHYSICS MCQ: CURRENT ELECTRICITY

1 Hard

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Analyzing +4 | -1

Fifty electric bulbs, all identical, are connected in series across the mains of a

\mathrm{220}\,\,\mathrm{V}

supply. After one bulb is fused, the remaining

\mathrm{49}

bulbs connected in series across the same mains. The illumination will be

View answer and explanation

Correct option: D

In the ratio

{\left( {50} \right)^2}:\,\,{\left( {49} \right)^2}

in the first and second case respectively

The correct answer is In the ratio

{\left( {50} \right)^2}:\,\,{\left( {49} \right)^2}

in the first and second case respectively because the power is proportional to the square of the number of bulbs.

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\mathrm{quantity}\,\,\mathrm{/}\,\mathrm{quantities}

\mathrm{is}\,\,\mathrm{/}\,\,\mathrm{are}