NEET 2010 Physics question
A square current carrying loop is suspended in a uniform magnetic field acting in the plane of the loop. If the force on one arm of the loop is , the net force on the remaining three arms of the loop is
Answer: (2)
Solution
The net force on any closed current-carrying loop in a uniform magnetic field is zero: (the forces on the two arms parallel to the field are zero or cancel; the forces on opposite arms are equal and
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