1. Tardigrade
  2. Question
  3. Physics
  4. The combination of two identical cells, whether connected in series or parallel combination provides the same current through an external resistance of 2 Ω. The value of internal resistance of each cell is :

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. The combination of two identical cells, whether connected in series or parallel combination provides the same current through an external resistance of $2\, \Omega$. The value of internal resistance of each cell is :

JEE MainJEE Main 2022Current Electricity

Solution:

image
$I _{2}=\frac{ E }{\frac{ r }{2}+2}=\frac{2 E }{ r +4}$
$I _{1}= I _{2}$
$2 r +2= r +4$
$2 r - r =2\, \Omega$
$\Rightarrow r =2\, \Omega$