For telegraphy the most commonly used modulation system is

Most commonly used modulation system for telegraphy is ________

A

Multi-tone modulation

B

Single tone modulation

C

PCM

D

FSK

For telegraphy pulse code modulation (PCM) is widely used.

A

True

B

False

When was Morse system for telegraphy first used?

A

1843

B

1844

C

1845

D

1846

In telegraphy we generally use __________

A

Amplitude modulation

B

Frequency modulation

C

Frequency Shift Keying

D

Pulse Code modulation

Which element promoted the industrialization of wireless telegraphy?

A

The Second World War

B

The First World War

C

Post Independence

D

None of the above

Wireless telegraphy was developed by

A

Thomas Alva Edison

B

Heinrich Hertz

C

James Watt

D

Guglielmo Marconi

Who invented wireless telegraphy?

A

Samuel F.B. Morse

B

Heinrich Hertz

C

Guglielmo Marconi

D

Evelyn Granville

With whom did Ferdinand Braun share the Nobel Prize in Physics in 1909 for the development of wireless telegraphy?

A

Alexander Graham Bell

B

Guglielmo Marconi

C

Gabriel Lippmann

D

Alexander Stepanovich Popov

Which of the following modulation system is used for video-modulation?

A

DSB-SC

B

SSB-SC

C

VSB

D

FM

External modulation for ________ modulation format allows the most sensitive coherent detection mechanism.

A

FSK

B

DSK

C

PSK

D

ASK

For telegraphy the most commonly used modulation system is

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