Class 11 | Physics | chapter 2 | Units And Measurements

Identify the pair whose dimensions are equal. (a) Torque and work (b) Stress and energy (c) Force and stress (d) Force and work.

Ruhul Amin Alig

Kinetic Energy

Assertion: Formula for kinetic energy is K = 1 2 mu2 = ma Reason : Both the equation K = 1 2 mv2 and k = ma are dimensionally incorrect

Ruhul Amin Alig

Nucleus

Column-I Column-II (A) Distance between earth & stars (1) micron (B) Inter-atomic distance in a solid (2) angstrom (C) Size of the nucleus (3) light year (D) Wavelength of infrared laser (4) fermi (5) kilometre

Ruhul Amin Alig

Thermal Conductivity

The dimensional formula of the coefficient of thermal conductivity is : 1. [ M 1 L 1 T − 3 K − 1 ] M1L1T-3K-1 2. [ M 3 L − 1 T − 3 K ] M3L-1T-3K 3. [ M 1 L − 3 T − 1 K − 1 ] M1L-3T-1K-1 4. [ M 1 L 1 T − 3 K ] M1L1T-3K

Ruhul Amin Alig