Physics And Measurement Question 70

Question: The dimensions of resistivity in terms of $ M,L,T $ and $ Q $ where $ Q $ stands for the dimensions of charge, is

[MP PET 1993]

Options:

A) $ ML^{3}{{T}^{-1}}{{Q}^{-2}} $

B) $ ML^{3}{{T}^{-2}}{{Q}^{-1}} $

C) $ ML^{2}{{T}^{-1}}{{Q}^{-1}} $

D) $ ML{{T}^{-1}}{{Q}^{-1}} $

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Answer:

Correct Answer: A

Solution:

$ \rho =\frac{RA}{l} $ i.e. dimension of resistivity is $ [ML^{3}{{T}^{-1}}{{Q}^{-2}}] $



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