Physics, asked by gmkaur2013, 1 year ago

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 jassu70
5

2) 1/r

magnetic field due to a infinite long current carrying conductor is is inversely proportional to R

Answered by abhi178
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, \frac{\mu i}{2\pi r}

where \mu_0 is permeability of vaccum of medium. well, if medium is air or vaccum then permeability, \mu_0 = 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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