Homework SourseA rectangular loop of N closely packed turns is positioned n
A rectangular loop of N closely packed turns is positioned near a long straight wire as shown in Fig. below. What is the mutual inductance M for the loop-wire combination if N-112, a-1.6 an, b . 8.1 cm, and 47.0 cm? N turns Number Units 
Solution
M = [ N mu0 L / 2pi ] [ln (1 + b/a)]
= [ 112 * 4pi * 10-7 * 0.47 / 2pi ] [ln (1 + 8.1/1.6)]
= 0.0001039 * 1.802
= 1.87 * 10-4 H
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EL = - L * di/dt
L = EL / di/dt
= 23 / 32 k = 0.719 mH
