Question

To the terminals marked as `X and Y` in the given circuit, three students connect `4 ` cells of voltage `1.5 V` each in three different manners (A),(B), (C) shown in (Fig. 3.62). Find the readings `(V_A, V_B, V_C)` of the voltmeter, for the three students.
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Answer 1

As in (A), all the four cells are in series, in (B), only two cells are effectively in series and in ( C), onle one cell is effective, `V_A = 6.0 V, V_B = 3.0 V, V_C = 1.5 V`.