Two parallel wires carry equal current of 10A along same direction and are separated by a distance of 2 cm. Find the magnetic field at a point 2 cm away from each of these wires?

Asked by Tanya raj | 21st Aug, 2015, 08:23: PM

Expert Answer:

Since the current through both the wires is same and they are separated by a distance of 2 cm, the magnetic field due to both wires will be the same at a distance of 2 cm from them.
 
Hence, we have
 
begin mathsize 14px style straight B subscript 1 equals straight B subscript 2 equals fraction numerator straight mu subscript 0 over denominator 4 straight pi end fraction fraction numerator 2 straight I over denominator straight r end fraction equals 10 to the power of negative 7 end exponent cross times fraction numerator 2 cross times 10 over denominator 2 cross times 10 to the power of negative 2 end exponent end fraction space space space space space left parenthesis because fraction numerator straight mu subscript 0 over denominator 4 straight pi end fraction equals 10 to the power of negative 7 end exponent right parenthesis therefore straight B subscript 1 equals straight B subscript 2 equals 10 to the power of negative 4 end exponent space straight T end style

Answered by Romal Bhansali | 22nd Aug, 2015, 07:39: PM