Question

Question #1a79d

Answer 1

See below

Explanation:

Current is Simply the rate of flow of charge per unit time , nut if we are talking about electromagnetic current here we come across the strange behavior of current . which states when ever charge flows in closed loops it creates magnetic field .
You think correct about the ferromagnetic and its effects.

It plot the graph we must find a relation between them which is given by BiotSarvat law which states that magnetic field B due to current carrying wire at certain distance r from it about its length dl has relation
`I`=current
`dl`=length of piece of wire
`r^2` = perpendicular distance from wire

`dBpropI`
`dBpropdl`
`dBprop1/r^2`

so we can combine it to form

`dBprop(I*dl)/r^2`

`dB=mu_o/(4pi)*(I*dl)/r^2`

where `mu_o/(4pi)` is a constant
`:.` now we know from above law that `dBpropI` graph{x=y [-10, 10, -5, 5]}

which gives linear graph hence your point is proved