1 That converts electromagnetic energy into radio frequency signal
2 That converts radio frequency signal into electromagnetic energy
3 That converts guided electromagnetic waves into free space electromagnetic waves and vice-versa,used with a trasmitter or receiver
4 None of these
Explanation:
Conceptual Question
PHXII15:COMMUNICATION SYSTEMS
356851
Assertion : Microwave propagation is better than the sky wave propagation. Reason : Microwaves have frequencies 100 to \(300GHz\), which have very good directional properties.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
Explanation:
Microwaves have got good dirctional properties. Due to it, the microwaves can be directed as beam signals in a particular direction, much better than radio waves, because microwaves do not bend around the corners of any obstacle in their way.
PHXII15:COMMUNICATION SYSTEMS
356852
High frequency waves are
1 Absorbed by F layer
2 Reflected by the E layer
3 Capable of use for long distance transmission
4 Affected by the solar cycle
Explanation:
Conceptual Question
PHXII15:COMMUNICATION SYSTEMS
356853
A T.V. tower has a height of \(10\;m\) is in a region of average population density \(100\pi /K{m^2}\). The number of people that can recieve the transmission is nearly
1 \(1,28,000\)
2 64,000
3 \(2,56,000\)
4 32,000
Explanation:
Number of people that can receive \( = {\rm{ area }} \times {\rm{ population density }}\) \( = \pi {{\rm{d}}^2} \times {\rm{ population density}}\) \( = \pi (2{\rm{hR}}) \times 100\pi \) \( = 2{\rm{hR}} \times 100{\pi ^2} = 128000\)
1 That converts electromagnetic energy into radio frequency signal
2 That converts radio frequency signal into electromagnetic energy
3 That converts guided electromagnetic waves into free space electromagnetic waves and vice-versa,used with a trasmitter or receiver
4 None of these
Explanation:
Conceptual Question
PHXII15:COMMUNICATION SYSTEMS
356851
Assertion : Microwave propagation is better than the sky wave propagation. Reason : Microwaves have frequencies 100 to \(300GHz\), which have very good directional properties.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
Explanation:
Microwaves have got good dirctional properties. Due to it, the microwaves can be directed as beam signals in a particular direction, much better than radio waves, because microwaves do not bend around the corners of any obstacle in their way.
PHXII15:COMMUNICATION SYSTEMS
356852
High frequency waves are
1 Absorbed by F layer
2 Reflected by the E layer
3 Capable of use for long distance transmission
4 Affected by the solar cycle
Explanation:
Conceptual Question
PHXII15:COMMUNICATION SYSTEMS
356853
A T.V. tower has a height of \(10\;m\) is in a region of average population density \(100\pi /K{m^2}\). The number of people that can recieve the transmission is nearly
1 \(1,28,000\)
2 64,000
3 \(2,56,000\)
4 32,000
Explanation:
Number of people that can receive \( = {\rm{ area }} \times {\rm{ population density }}\) \( = \pi {{\rm{d}}^2} \times {\rm{ population density}}\) \( = \pi (2{\rm{hR}}) \times 100\pi \) \( = 2{\rm{hR}} \times 100{\pi ^2} = 128000\)
1 That converts electromagnetic energy into radio frequency signal
2 That converts radio frequency signal into electromagnetic energy
3 That converts guided electromagnetic waves into free space electromagnetic waves and vice-versa,used with a trasmitter or receiver
4 None of these
Explanation:
Conceptual Question
PHXII15:COMMUNICATION SYSTEMS
356851
Assertion : Microwave propagation is better than the sky wave propagation. Reason : Microwaves have frequencies 100 to \(300GHz\), which have very good directional properties.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
Explanation:
Microwaves have got good dirctional properties. Due to it, the microwaves can be directed as beam signals in a particular direction, much better than radio waves, because microwaves do not bend around the corners of any obstacle in their way.
PHXII15:COMMUNICATION SYSTEMS
356852
High frequency waves are
1 Absorbed by F layer
2 Reflected by the E layer
3 Capable of use for long distance transmission
4 Affected by the solar cycle
Explanation:
Conceptual Question
PHXII15:COMMUNICATION SYSTEMS
356853
A T.V. tower has a height of \(10\;m\) is in a region of average population density \(100\pi /K{m^2}\). The number of people that can recieve the transmission is nearly
1 \(1,28,000\)
2 64,000
3 \(2,56,000\)
4 32,000
Explanation:
Number of people that can receive \( = {\rm{ area }} \times {\rm{ population density }}\) \( = \pi {{\rm{d}}^2} \times {\rm{ population density}}\) \( = \pi (2{\rm{hR}}) \times 100\pi \) \( = 2{\rm{hR}} \times 100{\pi ^2} = 128000\)
NEET Test Series from KOTA - 10 Papers In MS WORD
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PHXII15:COMMUNICATION SYSTEMS
356850
An antenna is a device
1 That converts electromagnetic energy into radio frequency signal
2 That converts radio frequency signal into electromagnetic energy
3 That converts guided electromagnetic waves into free space electromagnetic waves and vice-versa,used with a trasmitter or receiver
4 None of these
Explanation:
Conceptual Question
PHXII15:COMMUNICATION SYSTEMS
356851
Assertion : Microwave propagation is better than the sky wave propagation. Reason : Microwaves have frequencies 100 to \(300GHz\), which have very good directional properties.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
Explanation:
Microwaves have got good dirctional properties. Due to it, the microwaves can be directed as beam signals in a particular direction, much better than radio waves, because microwaves do not bend around the corners of any obstacle in their way.
PHXII15:COMMUNICATION SYSTEMS
356852
High frequency waves are
1 Absorbed by F layer
2 Reflected by the E layer
3 Capable of use for long distance transmission
4 Affected by the solar cycle
Explanation:
Conceptual Question
PHXII15:COMMUNICATION SYSTEMS
356853
A T.V. tower has a height of \(10\;m\) is in a region of average population density \(100\pi /K{m^2}\). The number of people that can recieve the transmission is nearly
1 \(1,28,000\)
2 64,000
3 \(2,56,000\)
4 32,000
Explanation:
Number of people that can receive \( = {\rm{ area }} \times {\rm{ population density }}\) \( = \pi {{\rm{d}}^2} \times {\rm{ population density}}\) \( = \pi (2{\rm{hR}}) \times 100\pi \) \( = 2{\rm{hR}} \times 100{\pi ^2} = 128000\)
