Among the following sets, the one that have different dimensions is

Options

A. pressure, young's modulus stress
B. Emf, potential difference, electric potential
C. heat, workdone, energy
D. dipole moment, electric flux, electric field

Answer

D

Explanation

Dipole moment isgiven as
`p=q(2a)`
`[p]=[q(2a)]=ATxxL`
`L^(1)A^(1)T^(1)`
And electric field is given by
`E=F/q`
So `[E]=[F/q]=(MLT^(-2))/(AT)`
`=MLT^(-3)A`
But electric flux is given as
`phi=E A cos theta`
It is clear by above relation that dimensions of electric flux and electric field are different.