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Electromagnetic...

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  • Question 1
    4 / -1

    Consider the following statements about electromagnetic radiations; All of them
    (i) have energy
    (ii) exert pressure on an object
    (iii) have the same momentum
    Of these statements

  • Question 2
    4 / -1

    Television signals reach us only through the ground waves. The range R related with the transmitter height h is in proportion to

  • Question 3
    4 / -1

    In T.V. broadcasting both picture and sound are transmitted simultaneously.
    In this

  • Question 4
    4 / -1

    Which of the following radiations has the least wavelength?

  • Question 5
    4 / -1

    Sodium lamps are used in foggy conditions because

  • Question 6
    4 / -1

    The region of the atmosphere above troposphere is known as

  • Question 7
    4 / -1

    If c is the speed of electromagnetic waves in vacuum, its speed v in a medium of dielectric constant K and relative permeability μr is

  • Question 8
    4 / -1

    The electric field ( in NC-1) in an electromagnetic wave is given by E = 50 sin ω (t-x/c) The energy stored in a cylinder of crossection 10 cm2 and length 100 cm along the x-axis will be

  • Question 9
    4 / -1

    Who produced the electromagnetic waves first ?

  • Question 10
    4 / -1

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