1.

Helium gas goes through a cycle ABCDA (consisting of two isochoric and two isobaric lines) as shown in figure. Eficiency of this cycle is nearly: (Assume the gas to be close to ideal gas)

Answer»

<P>`12.5%`
`15.4%`
`9.1%`
`10.5%`

Solution :`eta % (P_(0)V_(0))/((f)/(2)(P_(0)V_(0))+(f)/(2)(2P_(0))V_(0)+2P_(0)V_(0))=(1)/((3)/(2)+3+2)`
`=(200)/(13) =15.4%`
Correct CHOICE : (B).


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