1.

In Q.No. 69, work done in complete cycle is :

Answer»

`3xx10^(-3)J`
`-3xx10^(-3)`
`6xx10^(-3)`
zero

Solution :WORK done in complete CYCLE = AREA of triangle ABC
`=(1)/(2)BC xxAC`
`=(1)/(2)3xx10^(-3)xx2`
`=3xx10^(-3)J`.
Thus, correct choice is (a).


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