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Communication Physics - Communication

Jharkhand Board (JAC) - STD 12 Science - Physics (Jharkhand - English Medium). 71 questions in this chapter.

Question types

Communication question types

71 questions across 1 question group — pick any mix to generate a Physics paper with step-by-step answer keys.

71
Questions
1
Question groups
5
Question types
Sample Questions

Communication questions

One sample from each question group in this chapter. Select any group above to see the full set with answer keys.

Q 1M.C.Q (1 Marks)1 Mark
Assertion : Fax is a modulating and demodulating device.
Reason : It is necessary for exact reproduction of a document.
  • A
    If both assertion and reason are true and the reason is the correct explanation of the assertion.
  • B
     If both assertion and reason are true but reason is not the correct explanation of the assertion.
  • C
     If assertion is true but reason is false.
  • ✓
     If assertion is false but reason is true.

Answer: D.

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Q 2M.C.Q (1 Marks)1 Mark
Assertion : Microwave propagation is better than the sky wave propagation.
Reason : Microwaves have frequencies 100 to 300 GHz, which have very good directional properties.
  • ✓
     If both assertion and reason are true and the reason is the correct explanation of the assertion.
  • B
     If both assertion and reason are true but reason is not the correct explanation of the assertion.
  • C
     If assertion is true but reason is false.
  • D
     If the assertion and reason both are false.

Answer: A.

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Q 3M.C.Q (1 Marks)1 Mark
Assertion : The television broadcasting becomes weaker with increasing distance.
Reason : The power transmitted from TV transmitter varies inversely as the distance of the receiver
  • A
     If both assertion and reason are true and the reason is the correct explanation of the assertion.
  • B
     If both assertion and reason are true but reason is not the correct explanation of the assertion.
  • ✓
    If assertion is true but reason is false.
  • D
    If the assertion and reason both are false.

Answer: C.

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Q 4M.C.Q (1 Marks)1 Mark
Assertion : The surface wave propagation is used for medium wave band and for television broadcasting.
Reason : The surface waves travel directly from transmitting antenna to receiver antenna through atmosphere.
  • ✓
     If both assertion and reason are true and the reason is the correct explanation of the assertion.
  • B
     If both assertion and reason are true but reason is not the correct explanation of the assertion.
  • C
    If assertion is true but reason is false.
  • D
     If the assertion and reason both are false.

Answer: A.

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Q 5M.C.Q (1 Marks)1 Mark
Assertion : The electromagnetic waves of shorter wavelength can travel longer distances on earth's surface than those of longer wavelengths.
Reason : Shorter the wavelength, the larger is the velocity of wave propagation.
  • A
     If both assertion and reason are true and the reason is the correct explanation of the assertion.
  • B
     If both assertion and reason are true but reason is not the correct explanation of the assertion.
  • ✓
    If assertion is true but reason is false.
  • D
     If the assertion and reason both are false.

Answer: C.

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