Question #1a79d

1 Answer
May 20, 2017

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