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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 metal plate weighing 750g is to be electroplated with 0.05% of its weight of silver.
- Two waves represented by following equations are travelling in same medium
- A conducting square frame of side ‘a’ and a long straight wire carrying current I
- If a vector 2i+3j+8k is perpendicular to the vector 4j-4i+αk, then value of α is
- A coil of inductive reactance 31 Ω has a resistance of 8 Ω. It is placed in series
Topics: Current Electricity (136)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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