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Current Electricity

JEE Main level, single correct, medium

260 of 380

Question 260 of 380

The figure shows three circuits $I,II$ and $III$ which are connected to a $3V$ battery. If the powers dissipated by the configurations $I,II$ and $III$ are ${P}_{1},{P}_{2}$ and ${P}_{3}$ respectively, then -

Show answer and solution

Answer: (A) ${P}_{2}\gt {P}_{1}\gt {P}_{3}$

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

P\propto \dfrac{1}{R}

{R}_{eq}

for

\left(I\right)

circuit by balanced Wheatstone bridge

{R}_{1}=1\Omega

{R}_{eq}

for circuit

\left(II\right)

by parallel combination

\dfrac{1}{{R}_{2}}=\dfrac{1}{2}+\dfrac{1}{2}+\dfrac{1}{1}

{R}_{2}=\dfrac{1}{2}

{R}_{eq}

for circuit

\left(III\right)

by parallel and series combination

{R}_{3}=1+\dfrac{1}{\dfrac{1}{2}+\dfrac{1}{2}}

{R}_{3}=2

so,

{P}_{2}\gt {P}_{1}\gt {P}_{3}

.

JEE Main question paper PDF

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JEE Main 2025 Apr 2 Shift 1 question paper

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JEE Main Physics practice question on Current Electricity (Electric Power and Heating Effect of Current), with the answer and a step-by-step solution. Scan a question from your own book or paper to get a whiteboard video.

The figure shows three circuits I,III,III,II and IIIIIIIII which are connected to a 3V3V3V battery. If the powers dissipated by the configurations I,III,III,II and IIIIIIIII are P1,P2{P}_{1},{P}_{2}P1​,P2​ and P3{P}_{3}P3​ respectively, then -

JEE Main question paper PDF

More Physics practice

The figure shows three circuits $I,II$ and $III$ which are connected to a $3V$ battery. If the powers dissipated by the configurations $I,II$ and $III$ are ${P}_{1},{P}_{2}$ and ${P}_{3}$ respectively, then -