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A potentiometer wire has length 4m resistance 8Ω. The resistance that must be connected in series with the wire and an accumulator of emf 2V, so as to get a potential gradientof 1mV per cm on the wire is
Options
(a) 32Ω
(b) 40Ω
(c) 44Ω
(d) 48Ω
Correct Answer:
32Ω
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 spherical planet has a mass Mp and diameter Dp. A particle of mass
- The drift speed of electrons in copper wire of diameter and length l is v.
- A coil of 100 turns carries a current of 5 mA and creates a magnetic flux of 10⁻⁵ Wb.
- A Galilean telescope has an objective of focal length 100 cm and magnifying power 50
- A uniform wire of resistance 9Ω is joined end-to-end to form a circle. Then
Topics: Current Electricity (136)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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