Homework Help: Physics

Posted by sophie on Wednesday, April 22, 2009 at 2:07pm.

A current-carrying wire is oriented at right angles to a uniform magnetic field. If the length of the wire is
0.50 m and it experiences a force of 0.90 N while carrying a current of 4.0 A, what is the strength of the magnetic field?

I did the work and got:
0.45 ...???

Physics - drwls, Wednesday, April 22, 2009 at 3:49pm
In this situation,

F = B I L

where L is the length of the wire.

Therefore,

B = F/(IL)

You got the correct number. The units are Teslas (T)
Physics - sophie, Wednesday, April 22, 2009 at 4:05pm
yes, 0.45 T thanks for checking!

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