1.

For driving a current of 2 A for 6 minutes in a circuit, 1000 J of work is to be done.  The e.m.f. of the source in the circuit is                                                                                          [CPMT 1999]

A.            1.38 V
B.                                      1.68 V
C.            2.04 V                                      
D.            3.10 V
Answer» B.                                      1.68 V


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