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100 cells each of emf 5V and internal resistance 1 Ω are to be arranged so as to produce maximum current in a 25 Ω resistance. Each row contains equal number of cells. The number of rows should be(a) 2 (b) 4 (c) 5 (d) 100 |
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Answer» Correct option (a) 2 Explanation: Total no. of cells, = mn = 100 Current will be maximum when R = nr/m; 25 = n x 1/m ⇒ n = 25 m From equation (i) and (ii) n = 50 and m = 2 |
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