In India electricity is supplied for domestic use at ${\rm{220}}\,\,{\rm{V}}$. It is supplied at ${\rm{110}}\,\,{\rm{V}}$ in USA. If the resistance of a ${\rm{60}}\,\,{\rm{W}}$ bulb for use in India is $R$,the resistance of a ${\rm{60}}\,\,{\rm{W}}$ bulb for use in USA will be

NEET UG PHYSICS MCQ: CURRENT ELECTRICITY

1 Medium

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Application +4 | -1

In India electricity is supplied for domestic use at

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

. It is supplied at

\mathrm{110}\,\,\mathrm{V}

in USA. If the resistance of a

\mathrm{60}\,\,\mathrm{W}

bulb for use in India is

R

,the resistance of a

\mathrm{60}\,\,\mathrm{W}

bulb for use in USA will be

View answer and explanation

Correct option: C

R/4

Option C (

R/4

) is correct because the resistance is proportional to the square of the voltage for the same power rating.

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