1.

The number of particles given by n=-D(n_(2)-n_(1))/(x_(2)-x_(1)) are crossing a unit area perpendicular to x-axis in unit time, where n_(1) and n_(2) are the number of particles per unit volume for the values x_(1) and x_(2) of x respectively. Then the dimensional formula of diffusion constant D is :

Answer»

`[M^(0)LT^(2)]`
`[M^(0)L^(2)T^(-4)]`
`[M^(0)LT^(-3)]`
`[M^(0)L^(2)T^(-1)]`

Solution :Here `D=(n(x_(2)-x_(1)))/(n_(2)-n_(1))`
Putting the dimensions
`D=(1)/("area" XX "time")xx(L)/(1/(volume))`
`=(L^(-2)xxT^(-1)xxL)/(L^(-3))=L^(2)T^(-1)`
`D=[M^(0)L^(2)T^(-1)]`
`:.(B)` is CORRECT.


Discussion

No Comment Found

Related InterviewSolutions