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Why does folded paper go farther than unfolded?
Folded paper goes farther than unfolded paper because folded paper weighs more than unfolded paper. Folded paper is too light to go far.
Can paper be folded in half more than 7 times?
A standard piece of paper cannot be folded 7 times, but the Mythbusters folded a hangar sized piece of paper 11 times.
Difference between a dipole and a folded dipole?
Electric fields are described by Coulomb's Law, and they are fairly straightforward; like charges repel and opposite charges attract. Magnetism is more complicated, although it looks very similar, since like poles repel and opposite poles attract. But where as there are electric charges which generate electric fields, there are not magnetic charges that generate magnetic fields. Magnetic fields are actually created by electric charges, just as electric fields are, which is why electricity and magnetism are both aspects of electromagnetism rather than being separate forces. Spinning electrons generate a particular kind of electric force which, in combination with other spinning electrons, winds up creating forces that can be conveniently described as magnetic lines of force. But in reality, they are a form of electric force. Physicists do theorize that there could be a particle called a magnetic monopole which generates its own magnetic force, rather than being dependent upon spinning electrons to do so, however no such particle has ever been detected and it remains purely theoretical.
How many different types of radiators are there?
1. Convitional Style 2. Folded Core 3. Modular Core
How many square will you get when you folded the paper in half 5 times?
It will still be one square unless you cut the paper.
Radiation resistance of folded dipole?
4*73=292 dattatreya
Is folded antenna nothing but the conical antenna?
A folded antenna is a dipole type.
What is the difference between yagi antenna and dipole antenna?
I don't think it has. Bandwidth depends on the diameter to length ratio of the antenna. The greater the diameter of the elements the wider the bandwidth. The inductance goes down and the capacitance goes up, giving the antenna a lower Q. the folded dipole has a greater effective diameter (at least double for the same materials). You can increase a normal dipole's bandwidth by increasing the diameter, hence the old time birdcage aerials.
How loop antenna and dipole antenna can be used interchangeably?
A full-wave loop antenna can be interchanged with a folded dipole without much difference. The input impedance is similar and the only difference is in the directivity: a full wave loop radiates along the axis of the loop, while a vertical folded dipole is omnidirectional.
Why was before used the 300 ohm transmission line?
The impedance of a centre fed dipole at resonance is about 73 ohms. The feed impedance of a folded dipole is four times that, 292 ohms. The feedpoint is of course balanced in both cases, thus 300 ohm balanced line is an excellent match for the folded dipole active element of a commercial TV antenna.
What are the advantage of Yagi-uda array?
The Yagi array allows a significant increase in antenna gain (expressed in dBi or Db over isotropic) by the simple addition of parasitic elements to a dipole or folded dipole.
What are the advantage of trap dipole antenna?
A dipole antenna, is a radio antenna that can be made of a simple wire, with a center-fed driven element. It consists of two metal conductors of rod or wire, oriented parallel and collinear with each other (in line with each other), with a small space between them. The radio frequency voltage is applied to the antenna at the center, between the two conductors. These antennas are the simplest practical antennas from a theoretical point of view. They are used alone as antennas, notably in traditional "rabbit ears" television antennas, and as the driven element in many other types of antennas, such as the Yagi. Dipole antennas were invented by German physicist Heinrich Hertz around 1886 in his pioneering experiments with radio waves.
Why are folded membranes in cells more effective than unfolded membranes?
Folded membranes in cells are more effective because they have more surface area. The wider area of space allows for more activity to occur without damage to the cell because of membrane's resistance.
How are folded mountains different from dome mountains?
folded mountains are folded
How does yagi-uda antenna differ from a folded dipole a loop antenna and a helical antenna?
Wow, your question on how a yagi-uda differs from a folded dipole, a loop antenna, and a helical antenna relates very much to how does a lawn mower engine relate to a V-8. The principals in all the antennas remains much the same. So I will deal with them in the order asked. The Yagi in its simplest form consists of 3 elements. The center element is the driven element and is essentially a dipole. Behind it is a slightly larger element called a reflector which does just that, it reflects signals to and from the dipole and in front there is the smaller director which helps focus energy. This is a directional antenna with gain. The folded dipole goes back to the basic dipole except it has makes a full loop. They are just as about as long as regular dipoles. With the loop of wire out there, they tend to have a wider band width than regular dipoles - but are not as tolerant of being used at even multiples of their cut frequency as the wires tend to cancel out each other. Oh, btw, yagi's have been made using folded dipoles. You must use ladder line or a 4:1 balun on folded dipoles, with perhaps the exception of the terminated folded dipole which has a resistor where the two elements of the dipole come together. The loop antenna? Which loop? I assume you are talking the traditional loop and not the magnetic loop. The full loop is normally computed to be 1005/frequency=feet. While you could take the time to tune the antenna, it might just be easier to put in a balun and an antenna tuner. The main advantage of a loop over the previous reviewed antennas is that it does fairly well even though fairly close to the ground where the previous 2 antennas should be at least 1/2 a wave length up for good performance. Helical antennas are generally good for just one band. In fact, due to the loading they cause they are best if used on a single frequency as their feed line requires them to be provided the connecting feed the is the electrical equivalent of a 1/2 wave at that frequency of operation. This may work well at VHF and above as an entire band can be tuned satisfactory, but in HF it would limit you to a very small segment of the band. Helical antennas definitely are the lawn mower engines of the antenna world. Look up antenna elmer on your favorite search engine. You have entered into a world where there is still a lot homework left to be done.
Are postcards folded?
they r folded but not by the person who sends the note. they r folded by the post services.
How are mountains folded?
when the Earth plates collide.Rocks areforced into air and folded with pressure and built the folded mountins.
