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JEE Main 20254 AprilEvening Shift
Exam
JEE Main
Year
2025
Date
4 April
Shift
Evening Shift
Subject
Physics
Chapter
Current Electricity

JEE Main 2025 · 4 April · Evening Shift · Physics · Current Electricity

There are ' n ' number of identical electric bulbs, each is...

There are ' nn ' number of identical electric bulbs, each is designed to draw a power pp independently from the mains supply. They are now joined in series across the main supply. The total power drawn by the combination is :

Options

  1. Anp
  2. Bpn2\frac{\mathrm{p}}{\mathrm{n}^2}
  3. Cpn\frac{\mathrm{p}}{\mathrm{n}}
  4. Dp

Correct answer

C. pn\frac{\mathrm{p}}{\mathrm{n}}

Step-by-step solution

Rs=R1+R2+R3+……..+RnV2Ps=V2P+V2P+…….+V2PnPs=Pn\begin{aligned} & R_s=R_1+R_2+R_3+\ldots \ldots..+R_n \\ & \frac{V^2}{P_s}=\frac{V^2}{P}+\frac{V^2}{P}+\ldots \ldots.+\frac{V^2}{P_n} \\ & P_s=\frac{P}{n}\end{aligned}
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