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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
- The resistances of the four arms P,Q,R and S in a Wheatstone’s bridge
- A wheel has angular acceleration of 3.0 rad/sec² and an initial angular speed of 2.00
- The amount of heat energy required to raise the temperature of 1 g of Helium
- The wave function (in SI unit) for a light wave is given as Ψ(x,t)= 10³ sin π
- A bar magnet with magnetic moment 2.5×10³ JT⁻¹ is rotating in horizontal plane
Topics: Current Electricity (136)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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