A student in a physics lab mistakenly wired a light bulb, battery, and switch as shown . Explain why the bulb is on when the switch is open, and off when the switch is closed. (Do not try this—it is hard on the battery!) .RFigure 21.44 A wiring mistake put this switch in parallel with the device represented by R. (Note that in this diagram, the script E represents thevoltage (or electromotive force) of the battery.)

In parallel connection, greater current flows through the smaller resistance. A switch when open has…

.R Figure 21.44 A wiring mistake put this switch in parallel with the device represented by R. (Note that in this diagram, the script E represents the voltage (or electromotive force) of the battery.)

.R Figure 21.44 A wiring mistake put this switch in parallel with the device represented by R. (Note that in this diagram, the script E represents the voltage (or electromotive force) of the battery.)

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter12: Sources Of Magnetic Fields

Section: Chapter Questions

Problem 10CQ: Two concentric circular wines with different diameters carry currents in tire same direction....

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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 student in a physics lab mistakenly wired a light bulb, battery, and switch as shown . Explain why the bulb is on when the switch is open, and off when the switch is closed. (Do not try this—it is hard on the battery!)

.R
Figure 21.44 A wiring mistake put this switch in parallel with the device represented by R. (Note that in this diagram, the script E represents the
voltage (or electromotive force) of the battery.)

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