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KCET2019PhysicsThermodynamics

A thermodynamic system undergoes a cyclic process ( A B C ) as shown in the diagram. The work done by the system per cycle is

Options

  1. A( -750 ~J )
  2. B( 750 ~J )
  3. C( 1250 ~J )
  4. D( -1250 ~J )

Correct answer

A. ( -750 ~J )

Step-by-step solution

(A) Work done ( =p v ) Work done = Area of triangle ABC ( W= 1 2 (10-5) (100-400) ) ( = 5 2 (-300)=-750 ~J ) The negative sign means the work is done by the system.

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