What is modulation ?
A. It is a process of converting data into analog signals optimized for transmission
B. It is a process of converting data into electrical signals optimized for transmission
C. It is a signal
D. None of them
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Modulation is of ____ types.
A. Pulse modulation
B. Analog modulation
C. Digital modulation
D. All the above
A signal can be in which form ?
A. Speech
B. Audio
C. Video
D. All the above
A signal is a ____ that carries data from one network to another.
A. Electrical current
B. Electronic sign
C. Electromagnetic
D. None of them
A coaxial cable is also called:
A. Bi cable
B. Coax
C. Electric cable
D. Both b and c
Which of the following are the demodulators?
A. Telephone line
B. Optical fiber
C. Coaxial cable
D. All the above
Which of the following are the demodulators ?
A. Receivers
B. Modems
C. Radio receivers
D. All the above
Which of the following is the form of video signal ?
A. Recording
B. Broadcasting
C. Visual media display
D. All the above
Which of the following is the frequency of audio signal ?
A. 20 to 20000Hz
B. 30 to 3000Hz
C. 20 to 20000Hz
D. 200 to 20000Hz
Audio signal is represented in form of:
A. Sound
B. Heat
C. Light
D. All the above