Verified Solution • 2025–26 Session moderate

QJEEM21Ph8699: JEE Main 2021 Physics - Class 12 JEEM21Ph8699 Solution: Five identical cells each of internal resistance 1 Ω and emf 5V …

Five identical cells each of internal resistance 1Ω and emf 5V are connected in series and in parallel with an external resistance 'R'. For what value of 'R', current in series and parallel combination will remain the same?

Multiple Choice Options

  • A 1 Ω
  • B 25 Ω
  • C 5 Ω
  • D 10 Ω

Step-by-Step Verified Solution

i1=255+R

i2=5R+15

i1=i2⇒5(R+15)=5+R

4R = R

R = 1Ω

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