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Electromagnetic...

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  • Question 1
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    Which one of the following is the primary effect of UV radiation caused due to depletion of ozone layer?

  • Question 2
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    Infrared radiation are detected by

  • Question 3
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    A parallel plate capacitor of plate separation 2 mm is connected in an electric circuit having source voltage 400. What is the value of the displacement current for $$10^{-6}$$ s, if plate area is 60 $$cm^2$$

  • Question 4
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    An electromagnetic wave emitted by source travels $$21$$km to arrive at a receiver. The wave while travelling in another path is reflected from a surface at $$19$$km away and further travels $$12$$km to reach the same receiver. If distributive inference occurs at the receiving  end, the wavelength of the wave is

  • Question 5
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    The electric field part of an electromagnetic wave in a medium is represented by $$Ex=0$$

    $$Ey= 2.5 N/C ((2*10^6 rad/m)t - (*10^-2 rad/s) x)$$

    $$Ez=0$$ the wave is

  • Question 6
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    The electric field of a plane electromagnetic wave is given by
    $$\overrightarrow { y }=E_0 \hat{i} cos(kz)(\omega t) $$
    The corresponding magnetic field $$\overrightarrow { B }$$ is then given by:

  • Question 7
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    Some devices and electromagnetic wave are given in Column -I and Column - II, match the device with electromagnetic wave work:

    Column - IColumn - II
    (A) Mobile
    (B) Sonar
    (C) Radar
    (D) Optical fiber
    (P) Microwave
    (Q) IR
    (R) Radio wave
    (S) Ultra sound

  • Question 8
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    The amplitude of the sinusoidally oscillating electric field of a plane wave is 60v /m. Then the amplitude of  the magnetic field is

  • Question 9
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    The intensity of electromagnetic wave at a distance of 1$$\mathrm { km }$$ from a source of power $$12.56kW$$ is

  • Question 10
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    The electric component of an electromagnetic wave (in SI units) are given by
    $$E_x=10^2 sin [\pi (9 \times 10^{14} t-3 \times 10^6z)]$$
    $$E_y=0,E_z=0$$ find the inensity of this radiation.

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