COMMUNICATION SYSTEM

6 )

Ground waves are polarised at ______ direction.

horizontal

vertically upward

tangential direction to the surface of the earth

in all four

View Solution

Answer :

Ground waves are polarised vertically upward. If horizontally polarised then wave would be shorted out by the conductivity of ground.

7 )

Intensity of electric field of ground waves is in ______ of the distance travelled by it.

proportion

inverse

Square

inverse of root

View Solution

Answer :

Intensity of ground wave’s electric field ∝ [1 / (distance travelled)].

8 )

In radio and television broadcast, the information signal is in the form of

analog signal

digital signal

Both analog and digit signals

neither analog nor digital signal

View Solution

Answer :

In radio and Television broadcasting information signal is always analog.

9 )

In light modulation, which characteristics of the carrier light wave is varied?

Amplitude

Frequency

Phase

Intensity

View Solution

Answer :

In light modulation intensity of carrier light wave is varied.

10 )

Though which mode of communication can radio waves be sent from one Plate to another?

Ground wave Propagation

sky wave Propagation

Space wave Propagation

All of the above

View Solution

Answer :

Mode used for radio waves propagation–– ground wave, sky wave, space wave propagation.