1.

The P-V diagram for a cyclic process is a triangle ABC drawn in order. The co-ordinates of A, B, C are (4,1), (2,4) & (2,1). The co-ordinates are in order of P- V in which P is in "N/m"^(2) & volume in litres. The work done during the process from A to B is:

Answer»

`3xx10^(-3)J`
`-3xx10^(-3)J`
`6xx10^(-3)J`
`9xx10^(-3)J`

Solution :Work done from A to B is

`W_(AB)`= Area under the curve AB.
=Area of trapezium ABBA.
`W_(AB)=(1)/(2)(Aa+Bb)xxBC`
`=(1)/(2)(4+2)xx3xx10^(-3)`
`[because" 1 LITRE "=1000 CM^(3)=10^(-3)m^(3)]`
`=9xx10^(-3)J`


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