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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
- An inductor is connected to an a.c. source when compared to voltage,
- The electric field in a certain region is given by E=5i ̂-3ĵ kV/m. The potential
- The magnetic field at the centre of a circular coil carrying current I ampere is B.
- A monoatomic gas at a pressure P, having a volume V expands isothermally
- Angle of minimum deviation for a prism of reractive index 1.5 equal to the angle
Topics: Current Electricity (136)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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