Popular Questions
- The step index fiber has a relative refractive index of 0.88% . What is the critical angle at the corecladding interface
- The characteristic impedance of a coaxial cable is of the order of
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- Through which mode of propagation, the radio waves can be sent from one place to another
- A laser beam of pulse power
- The carrier frequency generated by a tank circuit containing 1 nF capacitor and 10 uH indicator is
- Broadcasting antennas are generally
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- A signal of 5 kHz frequency is amplitude modulated on a carrier wave of frequency 2 MHz. The frequencies of the resultant signal i..
- AM is used for broadcasting because
- Amplitude modulation has
- An example of point to point mode of communication is
- The wave that are bent down by the ionosphere are
- The Process of regaining of information from carrier wave at the receiver is termed as
- A step index fiber has a relative refractive index of 0.88%. What is the critical angle at the corecladding interface
- The characteristic impedance of a coaxial cable is of the order of
- In which frequency range, space waves are normally propagated
- For television broadcasting, the frequency employed is normally
- The ratio waves of frequency 300MHz to 3000MHz belong to
- an antenna behaves as resonant circuit only when its length is
- Maximum Usable frequency (MUF) in F - region layer is
- The electromagnetic waves of frequency 2 MHz to 30mhz are used
- A laser is a coherent source because it contains
- The attenuation in optical fiber is mainly due to
- Choose the correct statement
- A laser beam is used for carrying out surgery because it
- Laser beams are used to measure long distances because
- Which of the following shows greenhouse effect?
- Solar radiation is
- What is order of energy of X-rays (EX ), radio waves (ER ) and microwaves (EM )?
- During the propagation of electromagnetic waves in a medium,
- A plane electromagnetic wave of frequency 20 MHz travels through a space along x-direction. If the electric field vector at a cert..
- A plane electromagnetic wave of frequency 20 MHz travels through a space along x-direction. If the electric field vector at a cert..
- A plane electromagnetic wave of frequency 20 MHz travels through a space along x-direction. If the electric field vector at a cert..
- The speed of electromagnetic waves in vacuum depends upon the source of radiation. It
- An electromagnetic wave has
- A point source of electromagnetic radiation has an average power output of 1500 W. The maximum value of electric field at a distan..
- The dielectric constant of air is 1.006. The speed of electromagnetic wave travelling in air is a * 10^8 ms^-1, where, a is about
- An electromagnetic wave of frequency v = 3.0 MHz passes from vacuum into a dielectric medium with permittivity E = 4.0. Then
