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Two cells, having the same e.m.f. are connected in series through an external resistance R. Cells have internal resistances r₁ and r₂ (r₁ > r₂) respectively. When the circuit is closed, the potential difference across the first cell is zero. The value of R is
Options
(a) r₁ + r₂
(b) r₁ – r₂
(c) r₁ + r₂/2
(d) r₁ – r₂/2
Correct Answer:
r₁ – r₂
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 spring balance is attached to the ceiling of a lift.A man hangs his bag on the spring
- In old age arteries carrying blood in the human body become narrow resulting
- The drive shaft of an automobile rotates at 3600 rpm and transmits 80 HP
- The magnetic flux linked with a circuit of resistance 100Ω increases from 10 to 60 Wb.
- A projectile is fired at an angle of 45° with the horizontal
Topics: Current Electricity (136)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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