Also, the energy density and the total energy associated with the magnetic field and the 1 electric field are equal. The rate with the energy flows in an EM wave is S =–(E×B). Ho In the positive x direction, a plane EM wave varies sinusoidally at 99 MHz and the peak value of the electric field is 2 mV/m and it is moving in the ±y direction. The average density in the radiation is, (a) 1.75 ×10-14 J/m³ (b) 1.5 J/m³ (c) 30×10-1³ J/m³ (d) 0.755×10-14 J/m³
Also, the energy density and the total energy associated with the magnetic field and the 1 electric field are equal. The rate with the energy flows in an EM wave is S =–(E×B). Ho In the positive x direction, a plane EM wave varies sinusoidally at 99 MHz and the peak value of the electric field is 2 mV/m and it is moving in the ±y direction. The average density in the radiation is, (a) 1.75 ×10-14 J/m³ (b) 1.5 J/m³ (c) 30×10-1³ J/m³ (d) 0.755×10-14 J/m³
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
Transcribed Image Text:The general equation for the electric and the magnetic field as per the electromagnetic
theory is,
|
E| = Emax. cos (kx – ot)
= Bmay cos ( kx – ot)
The energy per unit volume in an electric field is,
1
Ug
2
The energy per unit volume in a magnetic field is,
UM
2 Ho
Also, the energy density and the total energy associated with the magnetic field and the
1
electric field are equal. The rate with the energy flows in an EM wave is S =÷(E×B).
Ho
In the positive x direction, a plane EM wave varies sinusoidally at 99 MHz and the peak
value of the electric field is 2 mV/m and it is moving in the ±y direction. The average
density in the radiation is,
(a) 1.75 ×10-14 J/m³
(b) 1.5 J/m?
(с) 30х10-13 J/m3
(d) 0.755×10-14 J/m³
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