induced current

[fredrick]

[IMG]http://img224.imageshack.us/img224/9607/q1ts8.th.png[/img]
isnt the change in flux into the page so the induced mag field is out of the page, thus current going anticlockwise?

[Ahmad]

Be careful with change in flux. Change in anything is the final quantity minus the initial quantity.

In this case, the final flux would be 0 if the coil was completely removed from the magnetic field, and initial flux is into the page.

Change in flux = 0 - into the page = out of page

To oppose this change, a magnetic field into the page will be induced, hence current flows clockwise.

[fredrick]

Thankyou!
 
PS: One more question how is

[Ahmad]

No problem.

Infinite summation can be a little more complicated than finite summation, in this case, the summation is defined in a certain way called Ramanujan Summation where even certain sums that go off to infinity converge, just like this one.

http://en.wikipedia.org/wiki/Ramanujan_summation

[fredrick]

interesting No clue whats going on but thanks for the info!