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MHT CET Physics question

PhysicsCurrent ElectricityMHT CET

A cell supplies of 1 A through two resistors of each when in series and a current of 2.6 A through the same resistors but in parallel. What is the internal resistance of the cell ?

Answer: (C)

Solution

E = 1 × (10 + r) and E = 2.6 × (2.5 + r), so 10 + r = 6.5 + 2.6r and r = 3.5/1.6 ≈

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Question ID VK-044946