What is the flux density of a 2 in² area containing 30 Wb of flux?

Question

What is the flux density of a 2 in² area containing 30 Wb of flux?

Answer 1

Yes, James is right.  The formula I remeber from cave man days was:

phi = integral B.dA...but if the flux is perpendiclar to the area it simply becomes phi = BA or for you problem B=phi/A =30webers/2 in^2 = 15 webers/ in^2

since 1 square meter = 1 550.0031 square inch

B in mks units = 15/1550 =0.009677 webers/meter^2

Answer 2

im a lil rusty, but i think to work out magnetic flux density you simply take your flux amount over your area; in your case 30Wb over 2in squared. in these sort of calculations always make sure you use correct units throughout the question.