EASY
Earn 100

Which two of the following five physical parameters have the same dimensions?
1. Energy density 2. Refractive index
3. Dielectric constant 4. Young's modulus
5. Magnetic field
(a)1 and 4
(b)1 and 5
(c)2 and 4
(d)3 and 5

50% studentsanswered this correctly
Important Questions on Physical World and Measurement
EASY

MEDIUM

HARD

EASY

EASY
Let denote the dimensional formula of the permittivity of vacuum. If M = mass, L = length, T = time and A = electric current, then :

MEDIUM
Stoke's law states that the viscous drag force experienced by a sphere of radius a, moving with a speed through a fluid with coefficient of viscosity , is given by .
If this fluid is flowing through a cylindrical pipe of radius , length and a pressure difference of across its two ends, then the volume of water which flows through the pipe in time can be written as, , where is a dimensionless constant. Correct values of and are-

MEDIUM

MEDIUM

MEDIUM

MEDIUM

HARD

MEDIUM

MEDIUM

EASY

HARD

EASY

EASY

MEDIUM

MEDIUM

EASY

