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A potentiometer circuit has been set up for finding the internal resistance of a given cell. The main battery, used across the potentiometer wire, has an emf of 2.0V and a negligible internal resistance. The potentiometer wire itself is 4m long. When the resistance R connected across the given cell, then has values of
(i) infinity (ii) 9.5Ω
The balancing lengths of the potentiometer wire are found to be 3m and 2.85m, respectively. The value of internal resistance of the cell is
Options
(a) 0.25Ω
(b) 0.95Ω
(c) 0.5Ω
(d) 0.75Ω
Correct Answer:
0.5Ω
Explanation:
No explanation available. Be the first to write the explanation for this question by commenting below.
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Topics: Current Electricity
(136)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A motor-cyclist drives a motor cycle in a vertical circle. His minimum velocity
- Two tangent galvanometers A and B have coils of radii 8 cm and 16 cm respectively
- Initial pressure and volume of a gas are P and 800cc. If the final volume is 100cc
- Light of wavelength λ is incident on slit of width d. The resulting diffraction
- In an electrical circuit R,L,C and an AC voltage source are all connected in series.
Topics: Current Electricity (136)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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