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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
- What is the wavelength of light for the least energetic photon emitted
- The Priniple of LASER action involves
- A linear aperture whose width is 0.02 cm is placed immediately in front of a lens
- The limiting angle of incidence for an optical ray that can be transmitted
- The number of photo electrons emitted for light of a frequency v
Topics: Current Electricity (136)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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