Question

state and explain Ohm's law

Answer 1

ohm's law

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Answer 2

Ohm's law states that the current through a conductor between two points is directly proportional to the voltage across the two points. Introducing the constant of proportionality, the resistance, one arrives at the usual mathematical equation that describes this relationship.

B=μHB=μH

=μoμrH=μoμrH

μo–permeability  of  free  spaceμo–permeability  of  free  space

μr–relative  permeability  of  materialμr–relative  permeability  of  material

=μoμrNIl=μoμrNIl

ϕ=B×Aϕ=B×A

ϕ=μoμrNIAlϕ=μoμrNIAl

=MMFreluc  tan  ce=MMFreluc  tan  ce

MMF - Magnetive motive force

Hence this equation resembles I=VR=emfresis  tan  ce