# Help to solve the electromagnetic problem.

Discussion in 'Homework Help' started by sagar474, Dec 1, 2011.

1. ### sagar474 Thread Starter New Member

Jul 22, 2010
16
0
Determine the total magnetic flux through the rectangular loop shown in the figure. The source of the magnetic field is the long straight conductor carrying a current I.

there is no information about length of the conductor.

so I taken it is of infinite length.

B at distance r form the conductor is given by uI/2$image=http://www.elektroda.pl/cgi-bin/mimetex/mimetex.cgi?3%5Cpi&hash=cdfab07e04f37207cef03f7dda151037$r ( infinite current carrying conductor).

Flux=intg(B.dA)
=intg(μI/2πrdLdr)

B is content wrt L so

=LμI/2π intg((1/r)dr)
=LμI/2π*log(r2/r1)

but I'm not confident since the it differs form answer given in the book.