Propagation of Waves in Atmosphere
PHXII15:COMMUNICATION SYSTEMS

356845 A signal emitted by an antenna from a certain point can be received at another point of the surface in the form of

1 Sky wave
2 Ground wave
3 Sea wave
4 Both 1 and 2
PHXII15:COMMUNICATION SYSTEMS

356846 To double the covering range of a \(T V\) transmission tower, its height should be multiplied by

1 \(\dfrac{1}{\sqrt{2}}\)
2 2
3 4
4 \(\sqrt{2}\)
PHXII15:COMMUNICATION SYSTEMS

356847 Assertion :
The television broadcasting becomes weaker with increasing distance.
Reason :
The power transmitted from TV transmitter varies inversely as the distance of the receiver

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.
PHXII15:COMMUNICATION SYSTEMS

356848 Beyond which frequency, the ionosphere bends any incident electromagnetic radiation but does not reflect it back towards the earth?

1 \(50MHz\)
2 \(40MHz\)
3 \(30MHz\)
4 \(20MHz\)
PHXII15:COMMUNICATION SYSTEMS

356849 Assertion :
Elecromagnetic waves with frequencies smaller than the critical frequency of ionosphere cannot be used for communication using sky wave propagation.
Reason :
The redfractive index of the ionosphere becomes very high for frequencies higher than the critical frequency.

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.
PHXII15:COMMUNICATION SYSTEMS

356845 A signal emitted by an antenna from a certain point can be received at another point of the surface in the form of

1 Sky wave
2 Ground wave
3 Sea wave
4 Both 1 and 2
PHXII15:COMMUNICATION SYSTEMS

356846 To double the covering range of a \(T V\) transmission tower, its height should be multiplied by

1 \(\dfrac{1}{\sqrt{2}}\)
2 2
3 4
4 \(\sqrt{2}\)
PHXII15:COMMUNICATION SYSTEMS

356847 Assertion :
The television broadcasting becomes weaker with increasing distance.
Reason :
The power transmitted from TV transmitter varies inversely as the distance of the receiver

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.
PHXII15:COMMUNICATION SYSTEMS

356848 Beyond which frequency, the ionosphere bends any incident electromagnetic radiation but does not reflect it back towards the earth?

1 \(50MHz\)
2 \(40MHz\)
3 \(30MHz\)
4 \(20MHz\)
PHXII15:COMMUNICATION SYSTEMS

356849 Assertion :
Elecromagnetic waves with frequencies smaller than the critical frequency of ionosphere cannot be used for communication using sky wave propagation.
Reason :
The redfractive index of the ionosphere becomes very high for frequencies higher than the critical frequency.

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.
NEET Test Series from KOTA - 10 Papers In MS WORD WhatsApp Here
PHXII15:COMMUNICATION SYSTEMS

356845 A signal emitted by an antenna from a certain point can be received at another point of the surface in the form of

1 Sky wave
2 Ground wave
3 Sea wave
4 Both 1 and 2
PHXII15:COMMUNICATION SYSTEMS

356846 To double the covering range of a \(T V\) transmission tower, its height should be multiplied by

1 \(\dfrac{1}{\sqrt{2}}\)
2 2
3 4
4 \(\sqrt{2}\)
PHXII15:COMMUNICATION SYSTEMS

356847 Assertion :
The television broadcasting becomes weaker with increasing distance.
Reason :
The power transmitted from TV transmitter varies inversely as the distance of the receiver

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.
PHXII15:COMMUNICATION SYSTEMS

356848 Beyond which frequency, the ionosphere bends any incident electromagnetic radiation but does not reflect it back towards the earth?

1 \(50MHz\)
2 \(40MHz\)
3 \(30MHz\)
4 \(20MHz\)
PHXII15:COMMUNICATION SYSTEMS

356849 Assertion :
Elecromagnetic waves with frequencies smaller than the critical frequency of ionosphere cannot be used for communication using sky wave propagation.
Reason :
The redfractive index of the ionosphere becomes very high for frequencies higher than the critical frequency.

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.
PHXII15:COMMUNICATION SYSTEMS

356845 A signal emitted by an antenna from a certain point can be received at another point of the surface in the form of

1 Sky wave
2 Ground wave
3 Sea wave
4 Both 1 and 2
PHXII15:COMMUNICATION SYSTEMS

356846 To double the covering range of a \(T V\) transmission tower, its height should be multiplied by

1 \(\dfrac{1}{\sqrt{2}}\)
2 2
3 4
4 \(\sqrt{2}\)
PHXII15:COMMUNICATION SYSTEMS

356847 Assertion :
The television broadcasting becomes weaker with increasing distance.
Reason :
The power transmitted from TV transmitter varies inversely as the distance of the receiver

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.
PHXII15:COMMUNICATION SYSTEMS

356848 Beyond which frequency, the ionosphere bends any incident electromagnetic radiation but does not reflect it back towards the earth?

1 \(50MHz\)
2 \(40MHz\)
3 \(30MHz\)
4 \(20MHz\)
PHXII15:COMMUNICATION SYSTEMS

356849 Assertion :
Elecromagnetic waves with frequencies smaller than the critical frequency of ionosphere cannot be used for communication using sky wave propagation.
Reason :
The redfractive index of the ionosphere becomes very high for frequencies higher than the critical frequency.

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.
PHXII15:COMMUNICATION SYSTEMS

356845 A signal emitted by an antenna from a certain point can be received at another point of the surface in the form of

1 Sky wave
2 Ground wave
3 Sea wave
4 Both 1 and 2
PHXII15:COMMUNICATION SYSTEMS

356846 To double the covering range of a \(T V\) transmission tower, its height should be multiplied by

1 \(\dfrac{1}{\sqrt{2}}\)
2 2
3 4
4 \(\sqrt{2}\)
PHXII15:COMMUNICATION SYSTEMS

356847 Assertion :
The television broadcasting becomes weaker with increasing distance.
Reason :
The power transmitted from TV transmitter varies inversely as the distance of the receiver

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.
PHXII15:COMMUNICATION SYSTEMS

356848 Beyond which frequency, the ionosphere bends any incident electromagnetic radiation but does not reflect it back towards the earth?

1 \(50MHz\)
2 \(40MHz\)
3 \(30MHz\)
4 \(20MHz\)
PHXII15:COMMUNICATION SYSTEMS

356849 Assertion :
Elecromagnetic waves with frequencies smaller than the critical frequency of ionosphere cannot be used for communication using sky wave propagation.
Reason :
The redfractive index of the ionosphere becomes very high for frequencies higher than the critical frequency.

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.