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Question

In the figure , the net amount of work done will be: 

  1. Positive 
  2. Negative 
  3. Zero 
  4. Infinity


Solution

The correct option is A Positive 
The process AB is isochoric and hence work done is zero. In the process BC volume increases and therefore work done in negative. In process CA volume decreases and hence work is positive. Now, since area under AC > BC more work is done during compression and hence work done on the system in the overall cyclic process is positive.

 

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