Finding the magnitude of the force and direction.

AI Thread Summary
The discussion revolves around calculating the force exerted on a wire carrying a current of 6.50A in a magnetic field of 0.280T. The initial calculation yielded a force of 1.456N, but the user was informed that the length used in the calculation was incorrect due to the wire's bends and angles. It was pointed out that the wire's segments are not all aligned in the same direction, affecting the force's direction and magnitude. The user acknowledged the feedback and indicated they were figuring out a better approach to the problem. Accurate consideration of the wire's geometry and the angles involved is essential for solving the problem correctly.
jimmyboykun
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Homework Statement



A long wire carrying 6.50A of current makes two bends. The bent part of the wire passes through a uniform 0.280T magnetic field directed as shown in the figure and confined to a limited region of space.
Part A: Find the magnitude of the force that the magnetic field exerts on the wire.
Part B: Find the direction of the force that the magnetic field exerts on the wire.

here is the link for the figure. http://s16.postimg.org/li2tzpa4l/yg_20_92.jpg

Homework Equations



F=IlB


The Attempt at a Solution



I= 6.50A, B= 0.280T, and l=0.8m(I did the Pythagorean theorem to find the lenght)

F=(6.50A)(0.8m)(0.280T)

F= 1.456N.

I found the force, but I got the answer wrong. Can someone explain where did I go wrong? I'm confuse with this problem.
 
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jimmyboykun said:

Homework Statement



A long wire carrying 6.50A of current makes two bends. The bent part of the wire passes through a uniform 0.280T magnetic field directed as shown in the figure and confined to a limited region of space.
Part A: Find the magnitude of the force that the magnetic field exerts on the wire.
Part B: Find the direction of the force that the magnetic field exerts on the wire.

here is the link for the figure. http://s16.postimg.org/li2tzpa4l/yg_20_92.jpg

Homework Equations



F=IlB

The Attempt at a Solution



I= 6.50A, B= 0.280T, and l=0.8m(I did the Pythagorean theorem to find the lenght)

F=(6.50A)(0.8m)(0.280T)

F= 1.456N.

I found the force, but I got the answer wrong. Can someone explain where did I go wrong? I'm confuse with this problem.
The length you have is wrong.

80 cm of wire is at a 30° angle to the "horizontal", but there is also some length that is "horizontal" .

Furthermore, the force vectors from those two (or three) segments are not in the same direction.

attachment.php?attachmentid=66805&stc=1&d=1392870965.jpg
 

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ok so I think I figured out how to approach this problem. Thanks
 

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