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Question

Five cells of emf 1.5V and internal resistance 0.2 ohm are connected in series. The maximum current that can be delivered is

A
7.5A
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B
1.5A
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C
4A
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D
2A
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Solution

The correct option is C 7.5A
Eeff=1.5×5
= 7.5 V
reff=0.2×5
=1Ω
for maximum current flow load resistance =0Ω
Eeff=Ireff
I=7.51=7.5A

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