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Consider a long straight wire of cross sectional area A carrying a current I.let there be n free electrons per unit volume.An observer place himself on a trolley moving in the direction opposite to I with a speed I/neA and separated from wire by distance r.The magnetic fields observed by person equal.


Consider a long straight wire of cross sectional area A carrying a current I.let there be n free electrons per unit volume.An observer place himself on a trolley moving in the direction opposite to I with a speed I/neA and separated from wire by distance r.The magnetic fields observed by person equal.


Grade:upto college level

1 Answers

ROSHAN MUJEEB
askIITians Faculty 829 Points
one year ago
Magnetic field here will be independent of motion of the observer because the velocity with which the movement of the observer is happening=drift velocity of electrons.B=2πrμo​i​

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