Solve this -325- In an electromagnetic wave- the amplitude of magnetic field is -3-33 - 10-8-T- The frequency of wave is 7 - 1014 Hz then the average energy density of electric field is -1- 2-21 - 10-10 J-m3 nbsp- nbsp- nbsp- nbsp- nbsp- nbsp- nbsp- nbsp- nbsp- nbsp- nbsp- nbsp- nbsp- nbsp- nbsp- nbsp- nbsp- -2- 4-42 - 10-10 J-m3-3- 8-85 - 10-10 J-m3 nbsp- nbsp- nbsp- nbsp- nbsp- nbsp- nbsp- nbsp- nbsp- nbsp- nbsp- nbsp- nbsp- nbsp- nbsp- nbsp- nbsp- -4- 17-7 - 10-10 J-m3

Dear #160;student,Average #160;energy #160;density #160;of #160;E=12 #8712;oE2B=3.3 #215;10 8TE=c #215;Bc= #160;speed #160;of #160;lightE= ...

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Standard XII

Physics

RMS Value

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325. In an electromagnetic wave, the amplitude of magnetic field is (3.33 * 10^-8)T. The frequency of wave is 7 * 10¹⁴ Hz then the average energy density of electric field is :
(1) 2.21 * 10^-10 J/m³ (2) 4.42 * 10^-10 J/m³
(3) 8.85 * 10^-10 J/m³ (4) 17.7 * 10^-10 J/m³

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Solution

$D e a r s t u d e n t, A v e r a g e e n e r g y d e n s i t y o f E = \frac{1}{2} \in_{o} E^{2} B = 3.3 \times 10^{- 8} T E = c \times B c = s p e e d o f l i g h t E = 3 \times 10^{8} \times 3.3 \times 10^{- 8} = 9.9 A v e r a g e e n e r g y d e n s i t y o f E = \frac{1}{2} \times 8.85 \times 10^{- 12} \times 9.9 \times 9.9 A v e r a g e e n e r g y d e n s i t y o f E = 4.42 \times 10^{- 10} J / m^{3} R e g a r d s$

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Solve this : 325. In an electromagnetic wave, the amplitude of magnetic field is (3.33 * 10-8)T. The frequency of wave is 7 * 1014 Hz then the average energy density of electric field is : (1) 2.21 * 10-10 J/m3 (2) 4.42 * 10-10 J/m3 (3) 8.85 * 10-10 J/m3 (4) 17.7 * 10-10 J/m3

Dear student,Average energy density of E=12∈oE2B=3.3×10-8TE=c×Bc= speed of lightE=3×108×3.3×10-8=9.9Average energy density of E=12×8.85×10-12×9.9×9.9Average energy density of E=4.42×10-10J/m3Regards

Solve this :

325. In an electromagnetic wave, the amplitude of magnetic field is (3.33 * 10^-8)T. The frequency of wave is 7 * 10¹⁴ Hz then the average energy density of electric field is :
(1) 2.21 * 10^-10 J/m³ (2) 4.42 * 10^-10 J/m³
(3) 8.85 * 10^-10 J/m³ (4) 17.7 * 10^-10 J/m³