Practice MCQ Questions and answers on Physics-GK Page-9 section-12

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81.
If a carrier wave of 1000 kHz is used to carry the signal, the length of transmitting antenna will be equal to ________.

A. 300 m

B. 30 m

C. 3 m

D. 0.3 m

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82.
Waves that are required for long distance wireless communication are

A. Infrared rays

B. Ultraviolet rays

C. Radio waves

D. Microwaves

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83.
A television channel is characterised by

A. Frequency of transmitted signal

B. Velocity of transmitted signal

C. Physical dimension of television screen

D. Size of picture tube

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84.
What is found in frequency modulation ?

A. Fixed frequency

B. Fixed dimension

C. Change in frequency and dimension

D. Change in dimension only

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85.
Positive feedback is used in

A. Amplifiers

B. Rectifiers

C. Oscillators

D. None of these

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86.
The waveform of a certain signal can be studied by

A. Spectrometer

B. Cathode ray oscilloscope

C. P – n junction diode

D. Sonometer

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87.
The GPS device in an automobile uses which communication channel?

A. Satellite

B. Microwave

C. Radio frequency

D. Infrared

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88.
In a optical fibre cable, the signal is propagated along the

A. Inner Core

B. Cladding

C. Both core and cladding

D. Surface and cladding

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89.
The audio signals of TV are

A. Amplitude modulated

B. Frequency modulated

C. Unmodulated

D. Velocity modulated

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90.
In radio-communication, the signals emitted by transmitting antenna are reflected on

A. Stratosphere

B. Ozonosphere

C. Ionosphere

D. Troposphere

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Practice MCQ Questions and answers on Physics-GK

81. If a carrier wave of 1000 kHz is used to carry the signal, the length of transmitting antenna will be equal to ________.

Answer & Solution

82. Waves that are required for long distance wireless communication are

Answer & Solution

83. A television channel is characterised by

Answer & Solution

84. What is found in frequency modulation ?

Answer & Solution

85. Positive feedback is used in

Answer & Solution

86. The waveform of a certain signal can be studied by

Answer & Solution

87. The GPS device in an automobile uses which communication channel?

Answer & Solution

88. In a optical fibre cable, the signal is propagated along the

Answer & Solution

89. The audio signals of TV are

Answer & Solution

90. In radio-communication, the signals emitted by transmitting antenna are reflected on

Answer & Solution

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81.
If a carrier wave of 1000 kHz is used to carry the signal, the length of transmitting antenna will be equal to ________.

82.
Waves that are required for long distance wireless communication are

83.
A television channel is characterised by

84.
What is found in frequency modulation ?

85.
Positive feedback is used in

86.
The waveform of a certain signal can be studied by

87.
The GPS device in an automobile uses which communication channel?

88.
In a optical fibre cable, the signal is propagated along the

89.
The audio signals of TV are

90.
In radio-communication, the signals emitted by transmitting antenna are reflected on