A wire of mass 100 ~g , length 1 ~m and current 5 ~A is balanced in mid air by a magnetic field B , then find the value of B .

Step-by-step solution

Here, m=100 ~g =10⁻¹ ~kg , l=1 ~m , I=5 ~A For a wire balanced midway air by a magnetic field is m g=I l B or B= m g I l = 10⁻¹ 10 5 1 B=0.2 ~T