A gas is taken through the cycle A\rightarrowB\rightarrowC\rightarrowA, as shown. What is the net work done by the gas?

 

  • Option 1)

    -2000  J

  • Option 2)

    2000 J

  • Option 3)

    1000 J

  • Option 4)

    Zero

 

Answers (1)

As we learnt in

Work done in cyclic process -

It is the area under the cycle.

- wherein

Work is positive if cycle is clock wise. Work is negative if cycle is anti clock wise.

(for P - V diagram)

 

 

 

The given  diagram is a P-V indicator diagram. Work done for P-V indicator diagram is area of the cycle. 

Area of cycle = \frac{1}{2}\times 5\times 10^{-3}\times 4\times 10^{5} J

W = 1000J

Work is positive as cycle is clockwise.

Correct option is 3.

 


Option 1)

-2000  J

This solution is incorrect.

Option 2)

2000 J

This solution is incorrect.

Option 3)

1000 J

This solution is correct.

Option 4)

Zero

This solution is incorrect.

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