Dimensions of electrical resistence are

Options

A. `[ML^(2)T^(-3)A^(-1)]`
B. `[M^(-1)L^(-3)T^(4)A^(2)]`
C. `[ML^(3)T^(-3)A^(-3)]`
D. `[ML^(-1)L^(3)T^(3)A^(2)]`

Answer

b

Explanation

From Ohm's law, `V = IR rArr R = (V)/(I)`
`"Dimensions of" R = ("Dimensions of" V)/("Dimensions of" I)`
`= ([ML^(2)T^(-3)A^(-1)])/([A]) = ML^(2)T^(-3)A^(-2)`