Question

A wire oriented so that the current flows into the screen experiences a force that deflects downward. The direction of the magnetic field must be

a. left.
b. right.
c. down.
d. up.

Answer 1

Answer:b-right

Step-by-step explanation:

Given

current is flowing into the screen i.e.
`-\hat{k}` direction

length of wire is also in
`-\hat{k}` direction

Force experienced is in negative y direction i.e.
`-\hat{j}`

Force experienced by a current carrying wire in a magnetic field experience a force is given by

`F=I\left ( \vec{L}* \vec{B}\right )`

where I=current

L=length of element

B=magnetic field

Direction of magnetic field must be in
`\hat{i}`

as
`-\hat{k}* \hat{i}=-\hat{j}`