Heat absorbed by the gas undergo a cylic process along closed path in one complete cycle as shown in figure will be _____ J.

Options

A. `10^7pi`
B. `10^4 pi`
C. `10^2 pi`
D. `10^(-3)pi`

Answer

C

Explanation

For cyclic process `DeltaU=0`
Heat change for a system `DeltaQ=DeltaU+DeltaW`
`DeltaQ=DeltaU+Delta(PV)`
`therefore DeltaQ` = Area under the graph,
`=pir^2kPaxx"lit"`
`=pi((30-10)/2)^2` kPa x lit
`=pi(20/2)^@ kP_a xx "lit"`
`=pixx100xx10^3xx10^(-3)` J
`=100piJ=10^2 piJ`