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Chapter 1 of 12 • Page 1 of 248🔒 Protected PDF • Watermarked
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ElectricalElectrical Materials
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For a wire, its twisting couple per unit angular twist is given by

A

C =12π  a2 ηl

B

C =12π  a2 η2l2

C

C =12π  a2 η2l

D

C =12π  a4 ηl

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