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Four cells, each of emf E and internal resistance r, are connected in series across an external resistance R. By mistake one of the cells is connected in reverse. Then, the current in the external circuit is
Options
(a) 2E/4r+R
(b) 3E/4r+R
(c) 3E/3r+R
(d) 2E/3r+R
Correct Answer:
2E/4r+R
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 mass M is attached to the spring of force constant k,
- The de-Broglie wavelength associated with an electron accelerated by a potential
- The threshold wavelength for photoelectric emission from a material is 4800 Å.
- The angular velocity of a wheel increases from 100 rps to 300 rps in 10 seconds.
- A 1Ω resistance in series with an ammeter is balanced by 75 cm of potentiometer wire
Topics: Current Electricity (136)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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