Which one is not correct for a cyclic process as shown in the figure ?

Options

A. `dU = 0`
B. `q =- w`
C. w = `314 J`
D. w = `31.4 J`

Explanation

For a cyclic process, `dU = 0`
`:. Q = DeltaU +(-w) rArr q =- w`
Also, `w =` Area covered by sphere
`= pir^(2) = pi xx [((V_(2)-V_(1)))/(2)]^(2)`
`= (pixx(20)^(2))/(2^(2))`
`= 100 pi = 100 xx 3.14 = 314 J`