Question

A wire moves with a velocity $v$ through a magnetic field and experiences an induced charge separation as shown in the figure. Then the direction of the magnetic field is

• A. into the page.
• B. out of the page.
• C. towards the bottom of the page.
• D. towards the top of the page.

Answer 1

The correct option is A into the page.

Force on change is given by $q(V\times B)$
So, $F=q(v\times B)$
So, force direction is in the direction of $V\times B$
So, by using right hand rule for determing the direction of $V\times B$, we get direction of B into the plane of page.