Q.1.
In India, ___________ modulation is used for radio transmission
Q.2.
When the modulating signal controls the frequency of the carrier, we get___________
Q.3.
In a radio receiver, noise is generally developed at ___________
Q.4.
The diode detector in an AM radio receiver is usually found ___________
Q.5.
The function of ferrite antenna is to ___________
Q.6.
In superhetrodyne receiver, the input at mixer stage is ___________
Q.7.
Overmodulation results in ___________
Q.8.
A 50 kW carrier is to be amplitude modulated to a level of 85%. What is the carrier power after modulation?
Q.9.
The major advantage of FM over AM is ___________
Q.10.
In an AM wave, the majority of the power is in ___________
Q.11.
In an AM wave useful power is carrier by ___________
Q.12.
In a radio receiver, we generally use ___________ oscillator as a local oscillator
Q.13.
In radio transmission, the medium of transmission is ___________
Q.14.
A high Q tuned circuit will permit an amplifier to have high ___________
Q.15.
If a radio receiver amplifies all the signal frequencies equally well, it is said to have high ___________
Q.16.
If Amin = 40 and Amax = 60, what is the percentage of modulation?
Q.17.
The signal voltage induced in the aerial of a radio receiver is of the order of ___________
Q.18.
The letters AVC stand for ___________
Q.19.
In a TRF radio receiver, the RF and detection stages are tuned to ___________
Q.20.
The IF is 455 kHz. If the radio receiver is tuned to 855 kHz, the local oscillator frequency is ___________