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A long wire carrie scurrent of 25 A para...

A long wire carrie scurrent of `25` A parallel to the positive x axis, except for three of the four segments that follow the edges of a cube of side `0.4 m`, as shown in figure. The wire is in a uniform magnetic field of `2.0T` directed paralled to the positice x axis. What is the net magnetic force on the wire (in newton) ?

A

`20 hat(j)`

B

`20 hat(k)`

C

`20 (hat(j) - hat(k))`

D

`-20 hat(j)`

Text Solution

Verified by Experts

The correct Answer is:
D
Force `= 25(0.4 hat(i) - 0.4 hat(k)) xx 2 hat(i) = -20 hat(j)`
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