previous l 1 of 3 next. Exercise 30.8 Calcuate the coil\'s self-inductance. A to
ID: 1551495 • Letter: P
Question
previous l 1 of 3 next. Exercise 30.8 Calcuate the coil's self-inductance. A toroidal solenoid has 600 turns, cross-sectional area 7.00 cm and mean radius 4.10 cm Submit My Answers Give Up Part B If the current decreases un from 5.00 A to 2.00 A in 3.00 ms, calculate the self induced emf in Submit My Answers Gave up Part C The current is directed from terminal a of the coil to terminal b. Is the direction of the induced emf from a to b or from b to a? From a the L-C circuit is 1600 x 103 Hz, corresponding to one end of the AM radio broadcast band,Explanation / Answer
(A) L = u0 N^2 A / L
= (4pi x 10^-7) (600^2) (7 x 10^-4) / (2 pi 0.041)
= 1.23 x 10^-3 H
(B) emf = rate of change of flux = d (LI)/dt
= L dI/dt
= (1.23 x 10^-3) (5 - 2) / (3 x 10^-3)
= 1.23 Volt
(C) b to a.
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