%3Cp%3EThe%20switch%20in%20the%20circuit%20shown%20in%20Figure%2023-41%20is%20op
ID: 2295064 • Letter: #
Question
%3Cp%3EThe%20switch%20in%20the%20circuit%20shown%20in%20Figure%2023-41%20is%20open%0Ainitially.%3C%2Fp%3E%0A%3Cp%20class%3D%22figure%22%3E%3Cimg%20src%3D%0A%22http%3A%2F%2Fwww.webassign.net%2Fwalker%2F23-41.gif%22%20%2F%3E%3Cbr%20%2F%3E%0AFigure%2023-41%3C%2Fp%3E%0A%3Cp%3E(a)%20Find%20the%20current%20in%20the%20circuit%20a%20long%20time%20after%20the%20switch%0Ais%20closed.%20(Use%20E%20for%20%3Cimg%20src%3D%0A%22http%3A%2F%2Fwww.webassign.net%2Fimages%2FscriptE.gif%22%20alt%3D%22script%20e%22%20title%3D%0A%22script%20e%22%20%2F%3E%2C%20R1%20for%20%3Ci%3ER%3C%2Fi%3E%3Csub%3E1%3C%2Fsub%3E%2C%20R2%20for%0A%3Ci%3ER%3C%2Fi%3E%3Csub%3E2%3C%2Fsub%3E%20and%20%3Ci%3EL%3C%2Fi%3E%20as%20necessary.)%3Cbr%20%2F%3E%3C%2Fp%3E%0A%3Cp%3E(b)%20Describe%20the%20behavior%20of%20the%20light%20bulb%20from%20the%20time%20the%0Aswitch%20is%20closed%20until%20the%20current%20reaches%20the%20value%20found%20in%20part%0A(a).%3Cbr%20%2F%3E%3C%2Fp%3E%0A%3Cp%3E(c)%20Now%2C%20suppose%20the%20switch%20is%20opened%2C%20after%20having%20been%20closed%0Afor%20a%20long%20time.%20If%20the%20inductor%20is%20large%2C%20it%20is%20observed%20that%20the%0Alight%20flashes%20brightly%20and%20then%20burns%20out.%20Explain%20this%0Abehavior.%3Cbr%20%2F%3E%3C%2Fp%3E%0A%3Cp%3E(d)%20Find%20the%20voltage%20across%20the%20light%20bulb%20just%20before%20and%20just%0Aafter%20the%20switch%20is%20opened.%20(Use%20E%20for%20%3Cimg%20src%3D%0A%22http%3A%2F%2Fwww.webassign.net%2Fimages%2FscriptE.gif%22%20alt%3D%22script%20e%22%20title%3D%0A%22script%20e%22%20%2F%3E%2C%20R1%20for%20%3Ci%3ER%3C%2Fi%3E%3Csub%3E1%3C%2Fsub%3E%2C%20R2%20for%0A%3Ci%3ER%3C%2Fi%3E%3Csub%3E2%3C%2Fsub%3E%20and%20%3Ci%3EL%3C%2Fi%3E%20as%20necessary.)%3C%2Fp%3E%0AExplanation / Answer
a) after long time L is short circuit ,hence
I = E / R1
b)
current through light bulb goes on decreasing and hence it become dimmer with time.
c)
the energy stored in Inductor is dissipated through the Bulb . so it flashes and then when all energy is dissipated it goes off
d)
just before opening
VB = 0
just after closing the switch
VB= E *R2/ (R1 )
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.