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A rectangular loop with sides of length a= 1.80 cm and b= 2.10 cm is placed near a wire that carries a current that varies as a function of time: it=2.92 + 1.19t2 where the current is in Amperes and the time is in seconds. The distance from the straight wire to the closest side of the loop is d= 0.290 cm.

the figure is here : http://img171.imageshack.us/img171/5849/prob09awloop2aa6.gif [Broken]

1) What is the magnetic flux through the loop at time t= 2.50 seconds? (Define positive flux into the page.)

my answer is :

(mu0*I/2*pi)*b*ln[(d+a)/d]

=8.59×10-8 T*m^2

2) What is the induced e.m.f. in the loop at time t= 2.50 seconds?

(Note that positive emf is clockwise. Compute the rate of change of magnetic flux through the loop to get the e.m.f.. )

help me how to solve this problem ??

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# Homework Help: Help me how to solve this problem ?(e.m.f)

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