Question

What is the direction of the magnetic force on the current in each of the six cases shown in the following figures? . upward (b) Select -Select- (d) -Select- (e) -Select- (1) -Select-

Answer 1

Solution:

Magnetic force is given by

$\vec{F}=\int I\left ( \vec{dl}\times \vec{B} \right )$ (1)

So, for the direction of magnetic force, firstly put your right hand fingers in the direction of current such that the direction of magnetic field outward to the palm, then the direction of thumb represent the direction of magnetic force. That's all.

Part (a): Toward left.

Part (b): Into the page.

​​​​​​​Part (c): Upward.

​​​​​​​Part (d): All the directions, because in this case magnitude of magnetic force is zero.

​​​​​​​Part (e): Towards right.

​​​​​​​Part (f): Down wards