If M = mass, L = length, T = time and I = electric current, then the demensional formula of resistance R will be given by

Options

A. `[R]=[ML^2T^-3I^-2]`
B. `[R]=[ML^2T^-3I^2]`
C. `[R]=[ML^2T^3I^-2]`
D. `[R]=[ML^2T^3I^2]`

Answer

A

Explanation

`H=I^2Rt`
`:.[R]=[H/(I^2 t)]`
`[(ML^2T^_2)/(I^2T)]=[ML^2T^-3T^-2]`