1.

When a resistance of 2 ohm is connected across the terminals of a cell, the current is 0.5 A. When the resistance is increased to 5 ohm, the current is 0.25 A. The e.m.f. of the cell is                                 [MP PET 1999, 2000; Pb. PMT 2002; MP PMT 2000]

A.                    1.0 V
B.                                      1.5 V
C.                    2.0 V                                
D.            2.5 V
Answer» C.                    2.0 V                                


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