In the given arrangement, the reading of ammeter is same in each case when either \( K_{1} \) or...

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In the given arrangement, the reading of ammeter is same in each case when either \( K_{1} \) or \( K_{2} \) is closed. The reading of the ammeter is
(A)
(A) \( \frac{E_{1}-E_{2}}{R} \)
(B) \( \frac{E_{1}+E_{2}}{R} \)
(C) data given is not sufficient
(D) none of above
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