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**1. Homework Statement**

A small circular loop of area 2.00 cm^2 is placed in the plane of, and concentric with, a large circular loop of radius 1.00 m. The current in the large loop is changed at a constant rate from 165 A to -165 A (a change in direction) in 1 s, beginning at t = 0. What is the magnitude of the magnetic field B at the center of the small loop due to the current in the large loop at

(a) t = 0

(b) t = 0.500 s

(c) t = 1.00 s

Because the inner loop is small, assume B is uniform over its area.

(e) What emf is induced in the small loop at t = 0.500 s?

**2. Homework Equations**

B = μ0I/2r ?

EMF = -dFlux/dt

**3. The Attempt at a Solution**

I'm not sure how to start because I feel like the magnetic field at the center due to the large loop will still be affected in part by the small loop, so I'm not sure how to incorporate that to get started....any nudges in the right direction would be greatly appreciated!

Thanks