Magnetic field at a distance r from an infinitely long straight conductor carrying a steady current varies as
1) I/r^2
2) 1/r
3) r
4) 1/r^3
Answers
Answered by
5
2) 1/r
magnetic field due to a infinite long current carrying conductor is is inversely proportional to R
Answered by
3
option : (2) 1/r
explanation : magnetic field at a distance r from an infinitely long straight line conductor carrying steady current I is given by,
where is permeability of vaccum of medium. well, if medium is air or vaccum then permeability, = 4π × 10^-7 N/A²
from above expression it is clear that magnetic field due to infinitely long straight wire at a distance r is varies as 1/r
hence, option (2) is correct
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