A wooden toroidal core with a square cross section has an inner radius of 13 cm and an outer radius of 16 cm. It is wound with one layer of wire (of diameter .90 mm and resistance per meter 0.020 ohm/m).What are (a) the inductance and (b) the inductive time constant of the resulting toroid? Ignore the thickness of the insulation on the wire.

Classical Dynamics of Particles and Systems
5th Edition
ISBN:9780534408961
Author:Stephen T. Thornton, Jerry B. Marion
Publisher:Stephen T. Thornton, Jerry B. Marion
Chapter13: Continuous Systems; Waves
Section: Chapter Questions
Problem 13.14P
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A wooden toroidal core with a square cross section has an
inner radius of 13 cm and an outer radius of 16 cm. It is wound with
one layer of wire (of diameter .90 mm and resistance per meter
0.020 ohm/m).What are (a) the inductance and (b) the inductive time
constant of the resulting toroid? Ignore the thickness of the insulation
on the wire.

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