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Question: Answered & Verified by Expert
A cell can be balanced against $110 \mathrm{~cm}$ and $100 \mathrm{~cm}$ of potentiometer wire, respectively with and without being short circuited through a resistance of $10 \Omega$. Its internal resistance is
PhysicsCurrent ElectricityNEETNEET 2008 (Mains)
Options:
  • A Zero
  • B $1.0 \mathrm{ohm}$
  • C $0.5 \mathrm{ohm}$
  • D $2.0 \mathrm{ohm}$
Solution:
2182 Upvotes Verified Answer
The correct answer is: $1.0 \mathrm{ohm}$
Internal resistance $=\left(\frac{110}{100}-1\right) \times 10 \Omega$

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