The dimensional formula for the magnetic field is

Options

A. `[MT^(-2)A^(-1)]`
B. `[ML^(2)T^(-1)A^(-2)]`
C. `[MT^(-2)A^(-2)]`
D. `[MT^(-1)A^(-2)]`

Answer

A

Explanation

`"Magnetic field" = ("force")/("current" xx "Length")`
`= ([MLT^(-2)])/([M][L])= [MT^(-2)A^(-1)]`