Lorentz loop
A square shaped conducting wire is held in a uniform magnetic field, and a current with intensity
is flowing through the wire clockwise. The conducting wire is on the
-plane and the direction of the magnetic field is downward, perpendicular to the
-plane. Which of the following explanations is correct?
a) The direction of the magnetic force on section
ab
of the wire is
direction.
b) The directions of the magnetic forces on sections
ad
and
bc
of the wire are the same.
c) The net force of all the magnetic forces on the wire is zero.
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1 solution
force on any conducting wire placed in uniform magnetic field is given by f=i(l cross B) {biot- savart's law} where i=current flowing l=length vector of wire taken along the direction of current B=magnetic field vector. Force on a closed loop of conducting wire carrying a current and placed in a uniform magnetic field is zero