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      Question

      What is the effect of a magnetic field on a current

      carrying conductor?  
      A It experiences no force Correct Answer Incorrect Answer
      B It experiences a force perpendicular to both the magnetic field and the current Correct Answer Incorrect Answer
      C It experiences a force parallel to the current Correct Answer Incorrect Answer
      D It experiences a repulsive force Correct Answer Incorrect Answer

      Solution

      According to Lorentz force law, a currentcarrying conductor in a magnetic field experiences a force perpendicular to both the magnetic field and the current.   This is the principle behind electric motors.   The direction of the force can be found using Fleming's lefthand rule

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