an antenna behaves as resonant circuit only when its length is
Choose the correct statement
For television broadcasting, the frequency employed is normally
The ratio waves of frequency 300MHz to 3000MHz belong to
A laser is a coherent source because it contains
A laser beam is used for carrying out surgery because it
The characteristic impedance of a coaxial cable is of the order of
The step index fiber has a relative refractive index of 0.88% . What is the critical angle at the corecladding interface
The electromagnetic waves of frequency 2 MHz to 30mhz are used
The waves that are bent down by the ionosphere are
A laser beam of pulse power
Maximum Usable frequency (MUF) in F - region layer is
AM is used for broadcasting because
Amplitude modulation has
The carrier frequency generated by a tank circuit containing 1 nF capacitor and 10 uH indicator is
In which frequency range, space waves are normally propagated
The process of regaining of information from carrier wave at the receiver is termed as
If u1 and u2 are the refractive indices of the material of core and cladding of an optical fibre, then the loss of light due to i..
An example of point to point mode of communication is
Through which mode of propagation, the radio waves can be sent from one place to another
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