Version 001 – HW18 – gavrin – (25111) 1 This print ... - Web Physics

Version 001 – HW18 – gavrin – (25111) 2
Correct answer: 1.24183 A.
009 (part 3 of 3) 10.0 points
The switch has brushes within it so that the
switch can be thrown from a to b without
internalsparking. Nowtheswitchissmoothly
thrown from a to b, shorting the inductor and
resistor.
How much time elapses before the current
falls to 141 mA?
Correct answer: 38.9614 ms.
Energy Stored in an Inductor
010 10.0 points
In an RL series circuit, an inductor of 3.03 H
andaresistorof8Ωareconnected toa28.4V
battery. The switch of the circuit is initially
open. Next close the switch and wait for a
long time. Eventually the current reaches its
equilibrium value.
At this time, what is the corresponding
energy stored in the inductor?
Correct answer: 19.0928 J.
Time Constant and Current
011 (part 1 of 2) 10.0 points
The switch in the figure is closed at t = 0.
ε
L
R
Find the time constant of the circuit if L =
35.2 mH, E = 9.83 V, R = 4.78 Ω.
Correct answer: 7.36402 ms.
012 (part 2 of 2) 10.0 points
Calculate the current in the circuit at t =
2.13 ms.
Correct answer: 0.516529 A.
S