Calculate the dimensions of (a) `int vecE .dvecl, (b)vBl and (dPhi_0)/(dt)`. The symbols have their usual meanings.

Explanation

`(a) int E//dl=MLT^(-3) I^(-1)xxL=ML^(2)I^(-1)T^(-3)`
`(b) vBl=LT^(-1)xxMI^(-1)T_(-2)xxL`
`=ML^(2)I^(-1)T^(-3)`
`(c ) (d phi)/(dt)=MI^(-1)T^(-2)xxLxxLT^(-1)`
`=ML^(2)I^(-1)xxML^(2)xxT^(-3)`.