When an ideal gas at pressure f temperature T and volume V is isothermally compressed to V / n, its pressure becomes P_i. If the gas is compressed adibatically to V/n, its pressure becomes P_a. The ratio ${\mathrm{P}}_{\mathrm{i}}/{\mathrm{P}}_{\mathrm{a}} \mathrm{is} \left(\mathrm{\gamma }={\mathrm{C}}_{\mathrm{p}}/{\mathrm{C}}_{\mathrm{v}}\right)$

• A

  1

• B

  n

• C

  ${\mathrm{n}}^{\mathrm{\gamma }}$

• D

  ${\mathrm{n}}^{(1-\mathrm{\gamma })}$