A cell of emf E and internal resistance r supplies currents for the same time t through external resistances R 1 = 100 Ω Ω and R 2 = 40 Ω Ω separately. If the heat developed in both cases is the same, then the internal resistance of the cell is
Text Solution
Verified by ExpertsThe correct answer is:
C
Current drawn from the cell in resistance 
will be 
.
Therefore, heat produced in 
will be 
Heat produced in 
will be 
As per question, 
On solving we get,
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