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NEET 2011 Physics question

PhysicsCurrent ElectricityNEET 2011

A current of 2 A flows through a resistor when connected across a battery. The same battery supplies a current of 0.5 A when connected across a resistor. The internal resistance of the battery is :

Answer: (2)

Solution

Let the emf be E and internal resistance r. and $E =

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Question ID VK-090956