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In a plane electromagnetic wave of frequ...

In a plane electromagnetic wave of frequency `1.0 xx 10^(12)`Hz, the amplitude of the magnetic field is `5.0 xx 10^(-6) T.` (a) Calculate the amplitude of the electric field. (b) what is the total average energy density of the e.m. wave?

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A, C
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In a plane e.m. wave of frequency 1.5xx10^12Hz , the amplitude fo the magnetic field is 6.0xx10^-6T . (a) Calculate the amplitude of the electric field. (b) What is the total average energy density of the e.m. wave?

In a plane electromagnetic wave the electric field osciallates sinusoidally at a frequency of 2.0 xx 10^(10) and amplitude 48 m^(-1) (a) What is the wavelength of the wave (b) What is the amplitude of the oscillating magnetic field ? (c ) show that the average energy density of the vecE field equals to the average energy density of the vecB field . [ c= 3.0 xx 10^8 m s^(-1) ]

Knowledge Check

  • In an electromagnetic wave, the amplitude of magnetic field is 3xx10^(-10)T . If the frequency of the waves is 10^(12)Hz , then the amplitude of the associated electrical field will be :-

    A
    `9xx10^(-2)V//m`
    B
    `3xx10^(-2)V//m`
    C
    `3xx10^(-10)V//m`
    D
    `9V//m`

  • An electromagnetic wave fo frequency 1xx10^(14) Hz is propagating along z - axis. The amplitude of the electric field is 4V//m . If epsilon_(0)=8.8xx10^(-12)C^(2)//N-m^(2) , then the average energy density of electric field will be

    A
    `35.2xx10^(-12)J//m^(3)`
    B
    `35.2xx10^(-10)J//m^(3)`
    C
    `35.2xx10^(-11)J//m^(3)`
    D
    `35.2xx10^(-13)J//m^(3)`

  • In the EM wave the amplitude of magnetic fild H_(0) and the amplitude of electric field E_(0) at any place are related as

    A
    `H_(0) = E_(0)`
    B
    `H_(0) = E_(0) /c`
    C
    `H_(0)=E_(0)sqrt(mu_(0)/varepsilon_(0))`
    D
    `H_(0)=E_(0)sqrt(varepsilon_(0)/mu_(0))`

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    The amplitude of the magnetic field part of a harmonic electromagnetic wave in vacuum is B_0 = 540 X 10 (-3) T . What is the amplitude of the electronic field part of the wave ?

    In a plane electomagnetic wave, the electric field oscillates sinusoidally at a frequency of 2.0xx106(10)Hz and amplitude 48Vm^(-1) . (a) What is the wavelength of the wave? (b) What is the amplitude of the ocillating magnetic field ? (c ) Show that the average energy density of the vecE field equals the average energy density of the vecB field.

    In a plane electromagnetic wave, the electric field oscillates sinusoidally at a frequency of 2.0xx10^10 H_z and amplitude 48V_m^-1 (a) What is the wavelength o f the wave? (b) What is the amplitude of the oscillating magnetic field. (c) Show that the average energy density of the field E equals the average energy density of the field B.[c=3xx10^8 ms^-1] .

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