When the switches are arranged so that the current through the battery is maximum, what is the voltage across points A and B?
A
4V
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B
0V
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C
1V
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D
2V
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Solution
The correct option is B0V We know that current through the battery is maximum when Req of circuit across the battery is minimum. When S1 is closed current through the battery is maximum as Req of circuit across the battery is minimum and equal to 1Ω ∴i=241=24Ampere ∵ The current through AB is zero. ⇒ Voltage across AB is 0V.