The dimensional formula for the magnetic fiedl is

Options

A. `MT^(2)Q`
B. `MT^(2)Q^(-1)`
C. `MT^(-1)Q`
D. `MT^(-3)Q^(-1)`

Answer

C

Explanation

When a charge q moving with velocity `vecv` is placed in a unifrom magnetic field `vecB` the formce acting on it is given by
`vecF=q(veccxxvecB)` or `B=F/(qv)=([MLT^(-2)])/([Q][LT^(-1)])=[ML^(@)T^(-1)Q^(-1)]`