In the (p - V) diagram shown in figure, choose the correct options for the the process (a - b) :
.

Options

A. debsity of gas reduced to half
B. temperature of gas has increased to two times.
C. internal energy of gas has increased to four times
D. (T - V)graph is a parabola passing thriugh origin

Answer

A, C, D

Explanation

`rho prop (1)/(V)`
(V) is doubled so (rho) will remain half.
`U prop T prop p V`
According to given graph, `p prop V`
`:. U prop T prop p^2 or V^2`
(V) is doubled, so (U) and (T) both will become four times.
`p prop V`
`:. (T)/(V) prop V` (as `p prop (T)/(V))`
`:. T prop V^2`,
or (T - V) garph is a parabola passing through origin.