The resting frequency of the FM transmitter is 98.5MHz. The allowed minimum and maximum frequency on either side of the center frequency are respectively_____________.

In AM receiver, if 900 kHz station is tuned, then the local oscillator will have to produce a frequency of ______________.

Mobile communication is easily established by _______ communication.

The distance of a geostationary satellite's orbit from the Earth is about _______

The principle used for 'transmission of light signals through optical fibre is ________.

_________ is the most often used wire material.

The greatest technical problem with an analog communication system is _________.

The transmitter in a RADAR is a high power ________.

In a television, the picture signals are _________ modulated.

Resistance of any photosensitive material is ______ to the intensity of light exposed

Noise is a form of __________ variation.

The change in the resting frequency of a FM transmitter is called ________

Messages cannot be transmitted over long distances in _________ transmission.

In AM, the amplitude of the carrier wave is changed in accordance with that of the ________ of the signal wave.

The audio frequency range is ___________.

The radio waves after refraction from different part of ionosphere on reaching the earth are called as _______________.

All medium wave signals received during day time use __________ wave propagation.

The frequency range of 3 MHz to 30 MHz is used for ______.

The variation of frequency of carrier wave with respect to the amplitude of the modulating signal is called ______.

The output transducer of the communication system converts the radio signal into ________.