- #1
teme92
- 185
- 2
Homework Statement
A bar magnet, with pole strength 0.1 Wb and magnetic length (i.e. distance between the poles) of 5 cm, is placed so that one pole is 2 cm and the other 6 cm from a long, straight wire carrying a current of 6 Amps. The magnet lies in a plane perpendicular to the wire. Find the force on each pole of the magnet (indicating its direction on a diagram). What is the torque on the magnet about the axis of the wire
Homework Equations
F=qvB
F=BIl
B=[itex]\mu[/itex]0I/2[itex]\pi[/itex]R
[itex]\phi[/itex]=BA
The Attempt at a Solution
So I said:
F=BIl and B=[itex]\mu[/itex]0I/2[itex]\pi[/itex]R, therefore:
F=[itex]\mu[/itex]0I2l/2[itex]\pi[/itex]R
In this formula is l the distance between the poles and R the distance the pole is from the wire? Any help would be much appreciated.