JEE Advanced 2016 Physics question
A length-scale () depends on the permittivity () of a dielectric material, Boltzmann constant (), the absolute temperature (), the number per unit volume () of certain charged particles, and the charge () carried by each of the particles. Which of the following expression(s) for is(are) dimensionally correct?
Answer: (B),(D)
Solution
Electrostatic energy and are both energies, so has the dimension of length , and . (A) , square
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