Consider the statements: S1: The dimensions of Planck's constant and angular momentum are the same. S2: In Bohr's model, an electron revolves only in those orbits for which its angular momentum is an integral multiple of Planck's constant h. Choose the correct answer.
Options

Question

Consider the statements: S1: The dimensions of Planck's constant and angular momentum are the same. S2: In Bohr's model, an electron revolves only in those orbits for which its angular momentum is an integral multiple of Planck's constant h. Choose the correct answer.

Options

G1 Physics · Accepted Answer

Planck's constant has dimensions [h] = energy×time = ML²T⁻¹. Angular momentum also has dimensions [L] = ML²T⁻¹. Therefore S1 is correct. Bohr's quantisation condition is L = nħ = nh/(2π), not L = nh. Therefore S2, as written, is incorrect. Hence S1 is correct but S2 is incorrect. Correct option: C.