The discussion centers on the calculation of magnetic flux using the formulas BA cos(delta) and NBA. The user reported a magnetic flux of 0.512 Weber for the first question and 9 Weber for the second. Feedback indicated that while the second answer was correct, there was uncertainty regarding the use of the cosine function in the first calculation. The suggestion was made to consider the angle's definition and whether sine might be more appropriate in certain scenarios.
PREREQUISITESStudents studying electromagnetism, physics educators, and anyone involved in solving magnetic flux problems in academic or practical applications.
zack7 said:Homework Statement
The first question I used BA cos(delta)
My answer was 0.512 Weber
The second question I used NBA
My answer was 9 Weber
I would like to know whether my answers are right thank you
[PLAIN]http://img263.imageshack.us/img263/751/doentx.jpg[/CENTER][/QUOTE]
Second answer looks good.
Question about the first - was cos the correct function or should you use sin??
To test, you could consider if the question had used 90 degrees as the angle.
Would there be any flux through the area.
cos 90 = 0 ; sin 90 =1. would you want a zero answer [use cos] or a numerical answer [use sin] That's how I decide. Since the angle can be defined different ways [like those problems inclined to the vertical or inclined to the horizontal] it is not a good idea to decide on a function and try to use it in every problem.