Calculating Magnetic Force on a Wire in a Uniform Magnetic Field

[Suy]

Homework Statement

What is the magnetic force on a wire 0.25 m long, carrying a current of 4.0 A, when placed in a uniform magnetic field of 0.50 T, at an angle of 45 to the wire?

Homework Equations

The Attempt at a Solution

this question doesn't make sense to me
it said"when placed", so the wire should be placed in the uniform magnetic field, but at an angle of 45 to the wire,
if it is to the magnetic field, it will make more sense
i am confused...

 

[Delphi51]

If the wire is placed so the magnetic field is at 45 degrees to the wire, then the wire is 45 degrees to the magnetic field. Anyway, just B*cos(45) to get the component of the field that is perpendicular to the current.

 

[Suy]

ty...