Physics-
General
Easy

Question

Wires 1 and 2 carrying currents i1 and i2 respectively are inclined at an angle q to each other What is the force on a small element dl of wire 2 at a distance of r from wire 1 (as shown in figure) due to the magnetic field of wire 1

  1. fraction numerator mu subscript 0 end subscript over denominator 2 pi r end fraction i subscript 1 end subscript i subscript 2 end subscript d l t a n invisible function application theta    
  2. fraction numerator mu subscript 0 end subscript over denominator 2 pi r end fraction i subscript 1 end subscript i subscript 2 end subscript d l s i n invisible function application theta    
  3. fraction numerator mu subscript 0 end subscript over denominator 2 pi r subscript 1 end subscript i subscript 2 end subscript d l c o s invisible function application theta end fraction    
  4. fraction numerator mu subscript 0 end subscript over denominator 4 pi r end fraction i subscript 1 end subscript i subscript 2 end subscript d l s i n invisible function application theta    

The correct answer is: fraction numerator mu subscript 0 end subscript over denominator 2 pi r subscript 1 end subscript i subscript 2 end subscript d l c o s invisible function application theta end fraction

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