Sunday 19 February 2012
bam bam bhole happy maha shiv ratri
Friday 17 February 2012
Amazing things revealed about wireless in free space
strength of earth magnetic field.
if small coil is taken, its magnetic field diminishes as we move away from the coil.
But if experiment is carried out to have one wire coiled around a complete building of 50X50. and we produce magnetic field in this coil by audio signal then we can listen audio anywhere inside the buidling with even a transistor.
Now imagine a coil is wound by earths radius. Magnetic field produce will be so high that we cant feel change in its strength even going few feet higher.
What does this mean and why to consider this
so this is not the case we have to encircle a wire around the earth and whatever power is applied but the area covered by magnetic field will depend entirely on coil radius. Radio frequency signals have high frequencies and high frequency signals produce current back and forth in even a small wire because high frequency means small wavelength and that can be produced in small wire known as antenna. So at radio frequency we require small antenna and so this magnetic field strength produced due to earth will be responsible for free space propagation of RF Electromagnetic field :-P bit tricky!!
if small coil is taken, its magnetic field diminishes as we move away from the coil.
But if experiment is carried out to have one wire coiled around a complete building of 50X50. and we produce magnetic field in this coil by audio signal then we can listen audio anywhere inside the buidling with even a transistor.
Now imagine a coil is wound by earths radius. Magnetic field produce will be so high that we cant feel change in its strength even going few feet higher.
What does this mean and why to consider this
so this is not the case we have to encircle a wire around the earth and whatever power is applied but the area covered by magnetic field will depend entirely on coil radius. Radio frequency signals have high frequencies and high frequency signals produce current back and forth in even a small wire because high frequency means small wavelength and that can be produced in small wire known as antenna. So at radio frequency we require small antenna and so this magnetic field strength produced due to earth will be responsible for free space propagation of RF Electromagnetic field :-P bit tricky!!
Monday 13 February 2012
Wednesday 8 February 2012
lovers week
Thank you guyz for being special for me!!
You kept ur pomise being my friend till this point
Hope you extend your promise to be my friend forever. love you all guyz. :-D promise we will be delivering as many smiling moments for this world. Happy promise day to all..
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