Physics-
General
Easy

Question

A conducting loop carrying a current I is placed in a uniform magnetic field pointing into the plane of the paper as shown. The loop will have a tendency to

  1. contract    
  2. expand    
  3. move towards +ve x-axis    
  4. move towards –ve x-axis    

The correct answer is: expand


    d stack F with rightwards arrow on top equals I open parentheses d stack l with rightwards arrow on top cross times stack B with rightwards arrow on top close parentheses

    So the force will be outward direction as shown in figure (according to Fleming’s left hand rule). So the loop will expand.

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