A coil of self-inductance 10 mH and resistance 0.1 Q is connected through a switch to a battery of internal resistance 0.9 Q. After the switch is closed, the time taken for the current to attain 80% of the saturation value is [take In 5 = 1.6] 1. 0.324 s 2. 0.103 s 3. 0.002 s 4. 0.016 s

A coil of self-inductance 10 mH and resistance 0.1 Q is connected through a switch to a battery of internal resistance 0.9 Q. After the switch is closed, the time taken for the current to attain 80% of the saturation value is [take In 5 = 1.6] 1. 0.324 s 2. 0.103 s 3. 0.002 s 4. 0.016 s

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter33: Inductors And Ac Circuits

Section: Chapter Questions

Problem 77PQ

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Concept explainers

Magnetic Field Of Coaxial Cable

The word coaxial means same axis. So for a long straight cable to be coaxial, it must have concentric cylindrical shaped conductor around it. Coaxial cable (popularly called ‘coax’) has various applications ranging from current conductors to radiofrequency signal transmitters. This cable has lower emission losses and provides protection from electromagnetic interference which allows signals with less power to transmit over longer distances.For example, currents produced in the pickup of a stereo turntable generally travel to the amplifier through a coaxial cable.The self-inductance of a coaxial cable is another important characteristic, because it influences the propagation of electrical signals in the cable.

Question

A coil of self-inductance 10 mH and
resistance 0.1 Q is connected through a
switch to a battery of internal resistance 0.9
Q. After the switch is closed, the time taken
for the current to attain 80% of the saturation
value is [take In 5 = 1.6]
%3D
1.
0.324 s
2.
0.103 s
3.
0.002 s
4.
0.016 s

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