Verified Solution • 2025–26 Session moderate

QAIPMT-2011-Ph-1927: NEET 2011 Physics - Class 12 AIPMT-2011-Ph-1927 Solution: A current of 2 A flows through a \(2 \) resistor when connected …

A current of 2 A flows through a 2Ω2\Omega resistor when connected across a battery. The same battery supplies a current of 0.5 A when connected across a 9Ω9\Omega resistor. The internal resistance of the battery is

Multiple Choice Options

  • A 0.5 Ω0.5\ \Omega
  • B 1/3 Ω1/3\ \Omega
  • C 1/4 Ω1/4\ \Omega
  • D 1 Ω1\ \Omega

Step-by-Step Verified Solution

Let _ be the emf and r be internal resistance of the battery. In the first case, 2 = _ 2 + r In the second case, 0.5 = _ 9 + r Divide (i) by (ii), we get 2 0.5 = 9 + r 2 + r _ 4 + 2 r = 4.5 + 0.5 r 1.5 r = 0.5 _ r = 0.5 1.5 = 1 3 �

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