Calculate Electric Field from a Coiled Wire and Loop

[smahapatra3]

Homework Statement

A coil of wire is connected to a power supply, and a current runs in the coil. A single loop of wire is located near the coil, with its axis on the same line as the axis of the coil. The radius of the loop is 3 cm.

http://www.webassign.net/mi3/23.P.028.alt01-coil_loop.jpg

At a later time t2, the current in the coil begins to decrease.

(g) What is the magnitude of the electric field at location P, which is inside the wire?
(h) Now the wire loop is removed. Everything else remains as it was at time t2; the magnetic field is still changing at the same rate. What is the magnitude of the electric field at location P?

Homework Equations

emf = -d(phimag)/d(t)

The Attempt at a Solution

I found the emf to be 6.504e-4. I have no idea how to do g, but I thought h should be 0 since the loop is removed, but that was wrong.

 

[freshpaki429]

emf = E*2*pi*r so solve for E. I'm stuck on the last part as well. I thought the electric field would be zero if the loop was removed

 

[wilso266]

h) is fairly simple, it tells you that "Everything else remains as it was at time t2; the magnetic field is still changing at the same rate. What is the magnitude of the electric field at location P?" Therefore you MUST deduce that NOTHING changes at all and the electric field will be exactly the same as in part g. Hope this helps. :D