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A potentiometer wire of length L and a resistance r are connected in series with a battery of e.m.f. E₀ and a resistance r₁. An unknown e.m.f. E is balanced at a length l of the potentiometer wire. The e.m.f. E will be given by
Options
(a) E₀l/L
(b) LE₀r/(r+r₁)l
(c) LE₀r/lr₁
(d) E₀r/(r+r₁) l/L
Correct Answer:
E₀r/(r+r₁) l/L
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 magnetic field at the centre of a circular coil carrying current I ampere is B.
- Out of the following options which one can be used to produce a propagating
- A particle of unit mass undergoes one-dimensional motion such that its velocity varies
- A thin wire of resistance 4 ohm is bent to form a circle. The resistance across
- If ∆Q>0 when heat flows into a system, ∆W>0 when work is done on the system
Topics: Current Electricity (136)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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