Question

Pick out the INCORRECT statement from the following

• A. Speech signal requires a bandwidth of 2800 Hz
• B. The approximate bandwidth to transmit music is 20 kHz
• C. The bandwidth of video signals required to transmit pictures is 4.2 MHz
• D. The bandwidth usually allocated to transmit TV signals is 6 MHz
• E. Digital signals are usually in the form of sine waves

Answer 1

The Correct Option is D

We need to pick out the incorrect statement from the following options:

• Speech signal requires a bandwidth of 2800 Hz: This is correct. Speech signals typically require a bandwidth of around 2800 Hz.
• The approximate bandwidth to transmit music is 20 kHz: This is correct. Music signals generally require a bandwidth of about 20 kHz for good quality transmission.
• The bandwidth of video signals required to transmit pictures is 4.2 MHz: This is correct. A typical bandwidth required for transmitting video signals, especially for television broadcasts, is around 4.2 MHz.
• The bandwidth usually allocated to transmit TV signals is 6 MHz: This statement is incorrect. In most countries, the bandwidth allocated for TV signals (analog) is 6 MHz for each channel in the U.S. and 8 MHz in some other countries like Japan. However, this is not universally fixed at 6 MHz for all TV signals worldwide, especially considering digital TV broadcasting.
• Digital signals are usually in the form of sine waves: This is incorrect. Digital signals are typically represented by square waves, not sine waves.

Correct Answer: (D) The bandwidth usually allocated to transmit TV signals is 6 MHz