An immersion heater is rated ${\rm{418}}\,\,{\rm{W}}$. It should heat a litre of water from $10\,^\circ C$ to $30\,^\circ C$ in nearly

$\begin{array}{*{20}{l}} {{\rm{200}}\,\,{\rm{s}}} \end{array}$

$\begin{array}{*{20}{l}} {{\rm{44}}\,\,{\rm{s}}} \end{array}$

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

$\begin{array}{*{20}{l}} {{\rm{400}}\,\,{\rm{s}}} \end{array}$

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JEE PHYSICS MCQ: CURRENT ELECTRICITY

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Application +4 | -1

An immersion heater is rated

\mathrm{418}\,\,\mathrm{W}

. It should heat a litre of water from

10\,^\circ C

30\,^\circ C

in nearly

View answer and explanation

Correct option: C

\begin{array}{llllllllllllllllllll} {\mathrm{200}\,\,\mathrm{s}} \end{array}

Option C (200 s) is correct because it correctly calculates the time required to heat the water using the power of the immersion heater and the specific heat capacity of water.

JEE PHYSICS MCQ: CURRENT ELECTRICITY

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