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 wavelength and period of the wave is, (a) 3.03 m, 0.01 µs (b) 1.3 m, 0.01 s (c) 2.1 m, 10° s (d) 1.11 m, 0.55 s
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 wavelength and period of the wave is, (a) 3.03 m, 0.01 µs (b) 1.3 m, 0.01 s (c) 2.1 m, 10° s (d) 1.11 m, 0.55 s
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Transcribed Image Text:The general equation for the electric and the magnetic field as per the electromagnetic
theory is,
E= Emar, cos (kx –- ot)
B| = Bmar. Cos (kx – ox)
The energy per unit volume in an electric field is,
1
UE
The energy per unit volume in a magnetic field is,
1 B
UM
2 Ho
Also, the energy density and the total energy associated with the magnetic field and the
1
(E×B).
Ho
electric field are equal. The rate with the energy flows in an EM wave is S =-
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 ty direction. The wavelength
and period of the wave is,
(а) 3.03 m, 0.01 us
(b) 1.3 m, 0.01 s
(c) 2.1 m, 10s
(d) 1.11 m, 0.55 s
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