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1 Oct 2019

How does the flux of light from the electromagnetic and sound source depend on the distance r from the source?

A)r2

B)r-2

C) r3

D) r-1

E) r1/2

F)none of the above





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Deanna Hettinger
Deanna HettingerLv2
17 Mar 2019

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Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

Related questions

How does the flux of light from an isotropic source depend on the distance r from the source?


A. r2
B. r1
C. r–1
D. r–2
E. r1/2
F. none of the above

A coaxial cable consists of a solid inner conductor of radius R1 surrounded by a concentric cylindrical tube of inner radius R2and outer radius R3 (the figure). The conductors carry equal and opposite currents I0 distributed uniformly across their cross-sections. (Figure 1)

Figure 1: 

Part A

Determine the magnetic field at a distance R from the axis for R<R1.

Express your answer in terms of some or all of the variables R, R1, R2, R3, I0, and appropriate constants.

Part B

Determine the magnetic field at a distance R from the axis for R1<R<R2.

Express your answer in terms of some or all of the variables R, R1, R2, R3, I0, and appropriate constants.

Part C

Determine the magnetic field at a distance R from the axis for R2<R<R3.

Express your answer in terms of some or all of the variables R, R1, R2, R3, I0, and appropriate constants.

Part D

Determine the magnetic field at a distance R from the axis for R>R3.

Express your answer in terms of some or all of the variables R, R1, R2, R3, I0, and appropriate constants.

1. The wavelength of sound on a string is proportional to thesquare root of tension.
2. Frequency is proportional to wavelength, wave speedconstant.
3. The intensity of sound from a point source decreases inproportion to the distance from the source.
4. An electromagnetic wave travels at the speed of light.
5. Transverse waves oscillate perpendicular to the wavevelocity.

True of False? Why?

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