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# The magnetic field at the distance of 2cm from the axis of the straight conductor carrying current is 12mT. The current in a conductor in ampere is

chandan banik
32 Points
4 years ago
Expression for the magnetic field due to a infinite current carrying wire is,
$\large B=\mu i/2\Pi r$
or,12*10^-3=(4$\tiny \prod$ *10^-7)i/ 2$\tiny \prod$(2*10^-2)
or,i=1200 ampere