Question

A coil carrying a current is arranged within a
magnetic field and the coil experience forces that can
make it move.
In which direction does the coil move?
a) From X to Y
(b) Out of the paper
c) turns about the axis xy
d) Along the magnetic field
Lourer​

Answer 1

Answer:  (b) Out of the paper.

Explanation:

A coil carrying a current ( I ) is arranged within a magnetic field ( B ) and the coil experience Lorentz force ( F ) that can make it move.

We know, $\vec F = q \vec v \times \vec B$  

where q is the charge moving to produce the current and $\vec v$ is the velocity of charge  which is just in opposite direction of current ( i.e. $\vec v$ is along Y to X ).

The direction of magnetic field $\vec B$ is along horizontal side as shown in adjoining figure.

Therefore the Lorentz force $\vec F$ will be perpendicular to both the   $\vec v , \vec B$.

So the correct answer is option (b) Out of the paper.