An ideal gas is initially in the state (P, V,T). If the pressure is increased by an amount dP in an isothermal process, the volume decreases by an amount dV₁. On the other hand, if the same increase in pressure is given in an adiabatic process from the same initial state, the volume decreases by an amount dV₂.If dV₁ and dV₂ are small, the ratio dV₁/dV₂ is:

• A

  $\frac{1}{\mathrm{\gamma }}$

• B

  $\mathrm{\gamma }$

• C

  R

• D

  1