Answer / yogesh

Radio frequency (RF) is a rate of oscillation in the range
of about 30 kHz to 300 GHz, which corresponds to the
frequency of electrical signals normally used to produce
and detect radio waves. RF usually refers to electrical
rather than mechanical oscillations, although mechanical RF
systems do exist

Answer / anand_gupta112001

A frequency of electromagnetic (EM wave) radiation in the
range at which radio signals are transmitted, ranging from
approx.. 3 KHz to 300 GHz. Many astronomical bodies, such
as pulsars, quasars, and possibly black holes, emit radio
frequency radiation.

Short for radio frequency, any frequency within the
electromagnetic spectrum associated with radio wave
propagation. When an RF current is supplied to an antenna,
an electromagnetic field is created that then is able to
propagate through space. Many wireless technologies are
based on RF field propagation.

These frequencies make up part of the electromagnetic
radiation spectrum:

Ultra-low frequency (ULF) -- 0-3 Hz
Extremely low frequency (ELF) -- 3 Hz - 3 kHz
Very low frequency (VLF) -- 3kHz - 30 kHz
Low frequency (LF) -- 30 kHz - 300 kHz
Medium frequency (MF) -- 300 kHz - 3 MHz
High frequency (HF) -- 3MHz - 30 MHz
Very high frequency (VHF) -- 30 MHz - 300 MHz
Ultra-high frequency (UHF)-- 300MHz - 3 GHz
Super high frequency (SHF) -- 3GHz - 30 GHz
Extremely high frequency (EHF) -- 30GHz - 300 GHz

Answer / bagale

Radio Frequency

can i get comming traning school model question paper.

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What are the advantages of bjt?

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please send previous years question papers of JuniorEngineer (ELectronics)in RRB.

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Tell me why do we convert frequency domain to laplace domain?

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value of 4 bit A+~A

3 Answers   AAI Airports Authority Of India, Air Force,

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When compared with other transducers measuring temperature, a four-lead platinum RTD 1. has better linearity over a wide operating range 2. has better accuracy and precision 3. has better stability at high temperature 4. is inexpensive Which of these are correct? Select one: a. 1,2 and 3 b. 2,3 and 4 c. 1,2 and 4 d. 1,3 and 4

1 Answers  

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i want RRB chennai section engineer model papers &previous years papers including GK, ARITHEMETIC, REASONING, GENERAL ENGLISH IN THE YEAR 2005,2006,2007, 2008.

1 Answers  

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what is the difference between zener diode n tunnel diode in terms of their breakdown??????????

1 Answers   Bhel,

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Explain the approximate cost of the monitoring cables time domain reflectometry?

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what is the difference between modulation and demodulation

3 Answers   BT,

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Explain the Proportionates of Ordinary concrete,Standard concrete,High Stength Concrete of Grades "M10,M15,M20" , "M25,M30,M35,M40,M45,M50,M55" , "M60,M65,M70,M75,M80" Respectively.

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what happen when unit step signal is applied to a integrater circuit.explain with graph

10 Answers   BARC,

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