1.

The dimensional formula fo resistivity in terms of `M,L,T` and `Q` where `Q` stands for the dimensions of charge isA. `[ML^(3)T^(-1)Q^(-2)]`B. `[ML^(2)T^(-2)Q^(2)]`C. `[MLT^(-2)Q^(-2)]`D. `[ML^(2)T^(-2)Q^(-1)]`

Answer» Correct Answer - A
Since, `R=(rhol)/(A)` , where `rho` is specific resistance.
`therefore" "[rho]=[(RA)/(l)],R=(V)/(i),V=(W)/(Q)`
`" "[rho]=["ML"^(3)"T"^(-1)theta^(-2)]`


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