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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.

Amit Saxena , 11 Years ago
Grade upto college level
anser 1 Answers
ROSHAN MUJEEB

Last Activity: 4 Years 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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