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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
- A plane electromagnetic wave of frequency 20 MHz travels through a space along
- Consider a compound slab consisting of two different materials having equal thickness
- Electrons used in an electron microscope are accelerated by a voltage of 25 kV
- Two capacitors of 10pF and 20pF are connected to 200V and 100V sources, respectively.
- A black body is heated from 27° C to 127° C. The ratio of their energies of radiations
Topics: Current Electricity (136)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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