Question

The equation $(P+\frac{a}{v^2})(v-b)=constant$ . If P and V mean pressure and volume respectively, the C.G.S units of a is:

• A. Dyne X cm⁵
• B. Dyne X cm⁴
• C. Dyne / cm³
• D. Dyne / cm²

Answer 1

The correct option is B Dyne X cm⁴

Units of 'a' and $P{V}^2$ are same from the equation.

$UnitsofP=Dyne/c{m}^2$
$Unitsof{V}^2=c{m}^6.$
Units of a = Units of $P{V}^2$
$=Dyne\times c{m}^4$