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Radio wave of fixed amplitude can be pro...

Radio wave of fixed amplitude can be produced by-

A

using filter

B

using rectifier

C

using FET

D

using oscillator

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Knowledge Check

  • Statement I: If a carrier wave is amplitude modulated, the amplitude of its wave changes very slowly. Statement II: Generally, amplitude of wave of a data signal is much less than that of a carrier wave.

    A
    Statement I is true, statement II is true, statement II is a correct explanation for statement I.
    B
    Statement I is true, statement II is true, statement II is not a correct explanation for statement I.
    C
    Statement I is true, statement II is false.
    D
    Statement I is false, statement II is true.

  • in a stationary wave that forms a s result of reflection of waves from an obstacle, the ratio of the amplitude at an antinode to the amplitude at node is n. The fraction of energy reflected is

    A
    `((n-1)/n)^2`
    B
    `((n-1)/(n+1))^2`
    C
    `(1/n)^2`
    D
    `(n/(n+1))^2`

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