A silicon iron ring is wound with 800 turns, with a mean diameter of 120 mm and a cross-sectional area of 400 mm2. If, when carrying a current of 0.5 A, the relative permeability is found to be 3000, calculate (a) the self-inductance of the coil, (b) the induced e.m.f if the current is reduced to zero in 80 ms.
A silicon iron ring is wound with 800 turns, with a mean diameter of 120 mm and a cross-sectional area of 400 mm2. If, when carrying a current of 0.5 A, the relative permeability is found to be 3000, calculate (a) the self-inductance of the coil, (b) the induced e.m.f if the current is reduced to zero in 80 ms.
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
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A silicon iron ring is wound with 800 turns, with a mean diameter of 120 mm and a cross-sectional area of 400 mm2. If, when carrying a current of 0.5 A, the relative permeability is found to be 3000, calculate (a) the self-inductance of the coil, (b) the induced e.m.f if the current is reduced to zero in 80 ms.
Transcribed Image Text:The ring is shown sketched in Figure 9.10.
/= 0.5 A
800 Turns
d=
120 mm
c.s.a = 400 mm²
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