HBCSE Olympiads (Homi Bhabha Centre for Science Education) NSEP (Physics): Questions 1 of 63

Appeared in Year: 2016

Question

MCQ▾

Which of the following physical quantities have dimensions identical to each other?

Choices

Choice (4) Response

a.

where E is the electric field intensity and is the permittivity of free space

b.

The Young՚s modulus Y

c.

where B is the magnetic field and is the permeability of free space

d.

All b., a. and c. are correct

Answer

d.

Explanation

  • The Young՚s modulus is given by,

  • Strain is dimensionless quantity, therefore

  • The energy per unit volume is given as,

  • From result (1) , (2) , (3) and (4) , the dimensions of are same .