How Is the Potential Energy of a Bobbin Calculated in a Magnetic Field?

[txoricillo]

Homework Statement

A rectangular bobbin of 50 turns is got sides of 5.00 and 8.00 cm and carries a current of 1.75 A. I'ts orientated as shown in figure 37º and turns around z axis. Determine the potential energy of the bobbin when its inside a uniform magnetic field of 1.5T in the y-axis (potential energy is zero when angle is zero)

Homework Equations

dU=-muBsinthetadtheta
mu=NIA=0.35 Am²
B=1.5T
theta= angle between magneticfield and normal vector to the bobbin

The Attempt at a Solution

Integrate dU. Solution -0.315 J

 

[DrClaude]

The Attempt at a Solution

Integrate dU. Solution -0.315 J

Can you show your work? And what exactly is your question?