The figure shows the `P-V` plot of an ideal gas taken through a cycle `ABCDA`. The part `ABC` is a semi-circle and `CDA` is half of an ellipseThen

Options

A. The process during the path `ArarrB` is isthermal
B. Heat flows out of the gas during then path `BrarrCrarrD`
C. Work done during the path `ArarrBrarrC` is zero
D. Positive work is done by the gas in cycle `ABCDA`

Answer

B, D

Explanation

Temperature at `Bgt` temperature at D
`:. Delta U` is inegative (for `B rarr C rarr D`)
Also `W` is negative (for `B rarr C rarr D`)
Tracing is clockwise on `PV` diagram.
`:.` Total `W` is positive `:. (B) and(D)` are Correct