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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
- When a piece of metal is illuminated by a monochromatic light of wavelength λ,
- The magnetic field due to a current carrying circular loop of radius 3 cm at a point
- The charges Q, +q, and +q are placed at the vartices of an equilateral
- A person holding a rifle (mass of person and rifle together is 100 kg) stands on a smooth
- A common emitter amplifier has a voltage gain of 50, an input impedance of 100Ω
Topics: Current Electricity (136)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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