c D www.webassi gn.net/web/Student/Assignment Responses /last?dep-15675522 B. O-

Question

c D www.webassi gn.net/web/Student/Assignment Responses /last?dep-15675522 B. O-2 points serpsET932 P015. A 489-turn solenoid has a radius of 7.10 mm and an overall length of 14.2 cm. (a) What is its inductance? (b) If the solenoid is connected in series with a 2.so-n resistor and a battery, what is the time constant of the circuit? Need Help? LRead 9. O -1 points serpsET9 32P023 In the circuit shown ig the figure below, let L 8.00 H, R 3.20 n, and & 120 v. What is the self-induced emf 0.200 s after the switch is closed? Need Help? L Read

Explanation / Answer

here,

8)

number of turns , n = 489 turns

radius , r = 7.1 mm = 0.0071 m

length , l = 0.142 m

a)

the inductance of solenoid , L = u0 * N^2 * area /l

L = 1.26 * 10^-6 * 489^2 * pi * 0.0071^2 /0.142 H

L = 3.36 * 10^-4 H

b)

R = 2.5 ohm

the time constant , T = L/R

T = 3.34 * 10^-4 /2.5 s

T = 1.34 * 10^-4 s

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