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Consider elements dx and dy on rods 1 and 2, at distances x and y from the ends. The given line charges have uniform charge density.

Yes, current here = 3A. Use Superposition theorem.

Yeah... do go. Last year people at ranks 40k+ got groups like metallurgy civil in nit dgp.

Straight forward, use Hospital's rule

go to www.photobucket.us... upload it there, then copy the last link that u get there into the reply box here.

What or who is A?

What are you guys doing!!! Its a straightforward sum. Put x = tan@!

ece if u dont mind the distance.

Charge contained uptil r=a/2 = (1)

Charge contained from r=a/2 to r=a = (2)

Net charge in the sphere = (1) + (2)

Calculate potential at r=a. That will give u the potential at r=0 (it should be a conducting sphere)

meta @ nit dgp

@shrishti - It is foolish dropping 2 years for an nit. That's all that I can say.

the resistors only hinder the flow of electrons, but don't stop them from moving to the other side!

hmm... tricky question. as per ur state rank... you might get mech at nitt, and probably ece at some other nit other than trichy. ece at vit is a good choice if you are looking purely at placements, as i have heard that placements at vit are awesome, so with the hottest branch ie ece, you will get a good pay. However, if you get eee/ece at nit (southern one) you should prefer it over vit.

hmm... tricky question. as per ur state rank... you might get mech at nitt, and probably ece at some other nit other than trichy. ece at vit is a good choice if you are looking purely at placements, as i have heard that placements at vit are awesome, so with the hottest branch ie ece, you will get a good pay. However, if you get eee/ece at nit (southern one) you should prefer it over vit.