Propagation of Waves in Atmosphere
PHXII15:COMMUNICATION SYSTEMS

356815 Read the Statement - A and Statement - B carefully to mark the correct options given below:
Statement A :
For transmitting a signal, size of antenns (1) should be comparable to wavelength of signal (at least \(l = \frac{\lambda }{4}\) in dimension)
Statement B :
In amplitude modulation, amplitude of carrier wave remains constant (unchanged).

1 Statement A is correct but Statement B is incorrect.
2 Both Statement A and Statement B are incorrect.
3 Both Statement A and Statement B are correct.
4 Statement A is incorrect but Statement B is correct.
PHXII15:COMMUNICATION SYSTEMS

356816 A \(1 {~kW}\) signal is transmitted using a communication channel which provides attenuation at the rate of \(-2 {~dB}\) per \({km}\). If the communication channel has a total length of \(10 {~km}\), what will the power of the signal received?

1 \(5\,W\)
2 \(7\,W\)
3 \(8\,W\)
4 \(10\,W\)
PHXII15:COMMUNICATION SYSTEMS

356817 In satellite communication, the uplink frequency band used is

1 \(5.925 - 6.425\,GHz\)
2 \(420 - 890\,MHz\)
3 \(3.7 - 4.2\,GHz\)
4 \(76 - 88\,MHz\)
PHXII15:COMMUNICATION SYSTEMS

356818 As the e.m. waves travel in free space

1 Absorption takes place
2 Attenuation takes place
3 Redfraction takes place
4 Reflection takes place
PHXII15:COMMUNICATION SYSTEMS

356819 A transmitting antenna is kept on the surface of the earth. The minimum height of receiving antenna required to receive the signal in line of sight at \(4\;km\) distance from it is \(x \times {10^{ - 2}}\;m\). The value of \(x\) is (Let radius of earth \(R = 6400\;km\))

1 125
2 12.5
3 1.25
4 1250
PHXII15:COMMUNICATION SYSTEMS

356815 Read the Statement - A and Statement - B carefully to mark the correct options given below:
Statement A :
For transmitting a signal, size of antenns (1) should be comparable to wavelength of signal (at least \(l = \frac{\lambda }{4}\) in dimension)
Statement B :
In amplitude modulation, amplitude of carrier wave remains constant (unchanged).

1 Statement A is correct but Statement B is incorrect.
2 Both Statement A and Statement B are incorrect.
3 Both Statement A and Statement B are correct.
4 Statement A is incorrect but Statement B is correct.
PHXII15:COMMUNICATION SYSTEMS

356816 A \(1 {~kW}\) signal is transmitted using a communication channel which provides attenuation at the rate of \(-2 {~dB}\) per \({km}\). If the communication channel has a total length of \(10 {~km}\), what will the power of the signal received?

1 \(5\,W\)
2 \(7\,W\)
3 \(8\,W\)
4 \(10\,W\)
PHXII15:COMMUNICATION SYSTEMS

356817 In satellite communication, the uplink frequency band used is

1 \(5.925 - 6.425\,GHz\)
2 \(420 - 890\,MHz\)
3 \(3.7 - 4.2\,GHz\)
4 \(76 - 88\,MHz\)
PHXII15:COMMUNICATION SYSTEMS

356818 As the e.m. waves travel in free space

1 Absorption takes place
2 Attenuation takes place
3 Redfraction takes place
4 Reflection takes place
PHXII15:COMMUNICATION SYSTEMS

356819 A transmitting antenna is kept on the surface of the earth. The minimum height of receiving antenna required to receive the signal in line of sight at \(4\;km\) distance from it is \(x \times {10^{ - 2}}\;m\). The value of \(x\) is (Let radius of earth \(R = 6400\;km\))

1 125
2 12.5
3 1.25
4 1250
NEET Test Series from KOTA - 10 Papers In MS WORD WhatsApp Here
PHXII15:COMMUNICATION SYSTEMS

356815 Read the Statement - A and Statement - B carefully to mark the correct options given below:
Statement A :
For transmitting a signal, size of antenns (1) should be comparable to wavelength of signal (at least \(l = \frac{\lambda }{4}\) in dimension)
Statement B :
In amplitude modulation, amplitude of carrier wave remains constant (unchanged).

1 Statement A is correct but Statement B is incorrect.
2 Both Statement A and Statement B are incorrect.
3 Both Statement A and Statement B are correct.
4 Statement A is incorrect but Statement B is correct.
PHXII15:COMMUNICATION SYSTEMS

356816 A \(1 {~kW}\) signal is transmitted using a communication channel which provides attenuation at the rate of \(-2 {~dB}\) per \({km}\). If the communication channel has a total length of \(10 {~km}\), what will the power of the signal received?

1 \(5\,W\)
2 \(7\,W\)
3 \(8\,W\)
4 \(10\,W\)
PHXII15:COMMUNICATION SYSTEMS

356817 In satellite communication, the uplink frequency band used is

1 \(5.925 - 6.425\,GHz\)
2 \(420 - 890\,MHz\)
3 \(3.7 - 4.2\,GHz\)
4 \(76 - 88\,MHz\)
PHXII15:COMMUNICATION SYSTEMS

356818 As the e.m. waves travel in free space

1 Absorption takes place
2 Attenuation takes place
3 Redfraction takes place
4 Reflection takes place
PHXII15:COMMUNICATION SYSTEMS

356819 A transmitting antenna is kept on the surface of the earth. The minimum height of receiving antenna required to receive the signal in line of sight at \(4\;km\) distance from it is \(x \times {10^{ - 2}}\;m\). The value of \(x\) is (Let radius of earth \(R = 6400\;km\))

1 125
2 12.5
3 1.25
4 1250
PHXII15:COMMUNICATION SYSTEMS

356815 Read the Statement - A and Statement - B carefully to mark the correct options given below:
Statement A :
For transmitting a signal, size of antenns (1) should be comparable to wavelength of signal (at least \(l = \frac{\lambda }{4}\) in dimension)
Statement B :
In amplitude modulation, amplitude of carrier wave remains constant (unchanged).

1 Statement A is correct but Statement B is incorrect.
2 Both Statement A and Statement B are incorrect.
3 Both Statement A and Statement B are correct.
4 Statement A is incorrect but Statement B is correct.
PHXII15:COMMUNICATION SYSTEMS

356816 A \(1 {~kW}\) signal is transmitted using a communication channel which provides attenuation at the rate of \(-2 {~dB}\) per \({km}\). If the communication channel has a total length of \(10 {~km}\), what will the power of the signal received?

1 \(5\,W\)
2 \(7\,W\)
3 \(8\,W\)
4 \(10\,W\)
PHXII15:COMMUNICATION SYSTEMS

356817 In satellite communication, the uplink frequency band used is

1 \(5.925 - 6.425\,GHz\)
2 \(420 - 890\,MHz\)
3 \(3.7 - 4.2\,GHz\)
4 \(76 - 88\,MHz\)
PHXII15:COMMUNICATION SYSTEMS

356818 As the e.m. waves travel in free space

1 Absorption takes place
2 Attenuation takes place
3 Redfraction takes place
4 Reflection takes place
PHXII15:COMMUNICATION SYSTEMS

356819 A transmitting antenna is kept on the surface of the earth. The minimum height of receiving antenna required to receive the signal in line of sight at \(4\;km\) distance from it is \(x \times {10^{ - 2}}\;m\). The value of \(x\) is (Let radius of earth \(R = 6400\;km\))

1 125
2 12.5
3 1.25
4 1250
PHXII15:COMMUNICATION SYSTEMS

356815 Read the Statement - A and Statement - B carefully to mark the correct options given below:
Statement A :
For transmitting a signal, size of antenns (1) should be comparable to wavelength of signal (at least \(l = \frac{\lambda }{4}\) in dimension)
Statement B :
In amplitude modulation, amplitude of carrier wave remains constant (unchanged).

1 Statement A is correct but Statement B is incorrect.
2 Both Statement A and Statement B are incorrect.
3 Both Statement A and Statement B are correct.
4 Statement A is incorrect but Statement B is correct.
PHXII15:COMMUNICATION SYSTEMS

356816 A \(1 {~kW}\) signal is transmitted using a communication channel which provides attenuation at the rate of \(-2 {~dB}\) per \({km}\). If the communication channel has a total length of \(10 {~km}\), what will the power of the signal received?

1 \(5\,W\)
2 \(7\,W\)
3 \(8\,W\)
4 \(10\,W\)
PHXII15:COMMUNICATION SYSTEMS

356817 In satellite communication, the uplink frequency band used is

1 \(5.925 - 6.425\,GHz\)
2 \(420 - 890\,MHz\)
3 \(3.7 - 4.2\,GHz\)
4 \(76 - 88\,MHz\)
PHXII15:COMMUNICATION SYSTEMS

356818 As the e.m. waves travel in free space

1 Absorption takes place
2 Attenuation takes place
3 Redfraction takes place
4 Reflection takes place
PHXII15:COMMUNICATION SYSTEMS

356819 A transmitting antenna is kept on the surface of the earth. The minimum height of receiving antenna required to receive the signal in line of sight at \(4\;km\) distance from it is \(x \times {10^{ - 2}}\;m\). The value of \(x\) is (Let radius of earth \(R = 6400\;km\))

1 125
2 12.5
3 1.25
4 1250