Physics-
General
Easy

Question

A rod closing the circuit shown in figure moves along a U shaped wire at a constant speed v under the action of the force F. The circuit is in a uniform magnetic field perpendicular to the plane. Calculate F if the rate of heat generation in the circuit is Q

  1. F equals Q v    
  2. F equals fraction numerator Q over denominator v end fraction    
  3. F equals fraction numerator v over denominator Q end fraction    
  4. F equals square root of Q v end root    

The correct answer is: F equals fraction numerator Q over denominator v end fraction

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