A series parallel combination of batteries consisting of a large number N = 300 of identical cells, each with an internal resistances r = 0.3 Ω Ω , is loaded with an external resistance R = 10 Ω Ω . Find number ‘n’ of parallel groups consisting of an equal number of cells connected in series, at which the external resistance generates the highest thermal power.
Text Solution
Verified by ExpertsThe correct answer is:
CHECK THE SOLUTION.
(3)
Sol. Condition for maximum power is
Net internal resistance = Net external resistance
r net = R net
= R
n 2 = 
n = 
n = 3
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