A current of 2 A flows through a 2Ω resistor when connected across a battery. The same battery supplies a current of 0.5 A when connected across a 9Ω resistor. The internal resistance of the battery i

Question

A current of 2 A flows through a 2Ω resistor when connected across a battery. The same battery supplies a current of 0.5 A when connected across a 9Ω resistor. The internal resistance of the battery isNEET 2011 (Screening)

TestHub · Accepted Answer

R = z + r E ​ ​ 2 = 2 + r E ​ 0.5 = 9 + r E ​ ​ From Eqs. (i) and (ii), We have 0.5 2 ​ 4 3 r r ​ = 2 + r 9 + r ​ = 2 + r 9 + r ​ = 1 = 3 1 ​ Ω ​

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