Problem 31.25 The figure(Figure 1) shows a vertically polarized radio wave of fr

Question

Problem 31.25

The figure(Figure 1) shows a vertically polarized radio wave of frequency 8.0×105 Hz traveling into the page. The maximum electric field strength is 1000 V/m .

Part A

What is the maximum magnetic field strength?

Express your answer to two significant figures and include the

Part B

What is the magnetic field strength at a point where E =(500V/m,down) ?

Express your answer to two significant figures and include the appropriate units.

Problem 31.25

The figure(Figure 1) shows a vertically polarized radio wave of frequency 8.0×105 Hz traveling into the page. The maximum electric field strength is 1000 V/m .

Part A

What is the maximum magnetic field strength?

Express your answer to two significant figures and include the

Part B

What is the magnetic field strength at a point where E =(500V/m,down) ?

Express your answer to two significant figures and include the appropriate units.

Electromagnetic wave traveling into page

Explanation / Answer

Part A )

given

f = frequency 8.0 X 105 Hz

maximum electric field strength is 1000 V/m = Emax  

C = 3 X 108 m/sec

Emax = Bmax C

Bmax = Emax / C

Bmax = 1000 / 3 X 108

Bmax = 3.33333 X 10-6 T

Part B )

E = ( 500V/m, down )

using same above equation

E = B C

B = E / C

B = 500 / 3 X 108

B = 1.66666 X 10-6 T

only frequency can be used to find the distance in the figure..

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