what type of nergy do cordless telephones use?
137925
The use orange gamma rays.\nYou cant see them but the penetrate your body and can make orange's grow in your local network
283305
What is your question? I would be surprised if modern cell phones used discrete transitors. There are many transitors in a cell phone's integrated circuits however.
873537
When a person speaks into a telephone, the sound waves created by his voice enter the mouthpiece. An electric current carries the sound to the telephone of the person he is talking to. A telephone has two main parts: (1) the transmitter and (2) the receiver.\nThe Transmitter of a telephone serves as a sensitive "electric ear." It lies behind the mouthpiece of the phone. Like the human ear, the transmitter has an 14 eardrum." The eardrum of the telephone is a thin, round metal disk called a diaphragm. When a person talks into the telephone, the sound waves strike the diaphragm and make it vibrate. The diaphragm vibrates at various speeds, depending on the variations in air pressure caused by the varying tones of the speaker's voice.\n\n\nBehind the diaphragm lies a small cup filled with tiny grains of carbon. The diaphragm presses against these carbon grains. Low voltage electric current travels through the grains. This current comes from batteries at the telephone company. The pressure on the carbon grains varies as sound waves make the diaphragm vibrate. A loud sound causes the sound waves to push hard on the diaphragm. In turn, the diaphragm presses the grains tightly together. This action makes it easier for the electric current to travel through, and a large amount of electricity flows through the grains. When the sound is soft, the sound waves push lightly on the diaphragm. In turn, the diaphragm puts only a light pressure on the carbon grains. The grains are pressed together loosely. This makes it harder for the electric current to pass through them, and less current flows through the grains.\n\n\nThus, the pattern of the sound waves determines the pressure on the diaphragm. This pressure, in turn, regulates the pressure on the carbon grains. The crowded or loose grains cause the electric current to become stronger or weaker. The current copies the pattern of the sound waves and travels over a telephone wire to the receiver of another telephone.\n\n\nThe Receiver serves as an "electric mouth." Like a human voice, it has "vocal cords." The vocal cords of the receiver are a diaphragm. Two magnets located at the edge of the diaphragm cause it to vibrate. One of the magnets is a permanent magnet that constantly holds the diaphragm close to it. The other magnet is an electromagnet. It consists of a piece of iron with a coil of wire wound around it. When an electric current passes through the coil, the iron core becomes magnetized. The diaphragm is pulled toward the iron core and away from the permanent magnet. The pull of the electromagnet varies between strong and weak, depending on the variations in the current. Thus, the electromagnet controls the vibrations of the diaphragm in the receiver.\nThe electric current passing through the electromagnet becomes stronger or weaker according to the loud or soft sounds. This action causes the diaphragm to vibrate according to the speaker's speech pattern. As the diaphragm moves in and out, it pulls and pushes the air in front of it. The pressure on the air sets up sound waves that are the same as the ones sent into the transmitter. The sound waves strike the ear of the listener and he hears the words of the speaker.
623115
I believe in cell phones.\n\nI believe that if I receive a call from you it's not the phone that I'm talking to, but to a person that is not even inside the phone.\n\nI believe that when it runs out of battery, even in the middle of a conversation with you, that doesn't mean you've disappeared from the universe.\n\nI believe that every telephone was designed to receive a unique number through a unique frequency, and that such number and frequency are there even when the telephone is not in use.\n\nI believe that all cell phone signals are everywhere (within the range of the antenna)\n\nI believe these signals can be received by every single telephone in the area, and that it is even possible that any of those signals could interfere with any telephone conversation.\n\nI believe this because I can understand it.\n\nJust try to explain it to someone who hasn't heard a word about electricity.\n\nAnd try to convince them it's not something evil just because they don't understand it.
44801
Signals come to and leave your phone by means of a voltage level that is carried over copper twisted lines.  These levels used to be 90 volts, however most phones today don't require that much voltage for a ring.\n\nWhen you pick up the handset of your phone, you have "opened" a line out or in depending on whether you are answering or dialing out.  The dialing out part is you simply telling the "voltage" where to go next.\n\nModern phone systems still use the copper twisted pair method, but now those systems carry data as well for products like DSL.  The signals can also be carried via fiber optics.\n\nThe point at where the call is distributed or routed is called a switch, usually located at an exchange or a central office.\n\nFor more detailed explanations, click the link below.  It has all the information you could ever wish to know about landline and other telephone systems.
38000
analog telephony\n\nThe electronic transmission method used for carrying voice in the original telephone system. Analog telephony is still used in the last mile from the central office (CO) to the home or office. See POTS and analog.
587918
Land lines and that too corded ones.
683620
I have a BLack and Decker cordless, but why would you want to put a hole in a basketball?
95109
This might help\n\nhttp://www.ttec.co.tt/consumertips/conserveelectricity/default.htm
992673
I think called as bag phones or Mobile phone....\n\nwant to see Histroy of Mobile phone...\nsee this link\n\nhttp://en.wikipedia.org/wiki/History_of_mobile_phones
146268
In the telephone network, the pair of wires that connects your phone directly to the nearest box(switch) is called the Local-loop (coz' it's a dedicated pair of wires local to your phone). It's also called the Last-mile. \n\nWhen a telephone operator swtiches to WLL, it essentially means that he repalced your box(switch, and end-point your and many of your neighbours telephone wires) with a Wireless switch. So now your phone would communicate with the switch not using a wire but through air. Rest of the network (beyond the box) is the same.\n\nThis essentially means that you can roam about with your WLL phone within the aerial range of that switch(which now becomes an antenna).\n\nOn the contrary, when, in a Mobile network, you move out of the range of your present antenna, another antenna picks you up. This the reason why WLL is also called a Limited Mobility Mobile system.
148074
there are several kinds of hi-tech pipette, gilson style which pipette a volume (usually microlitre) which is set with a dial, pipette boy which has a small pump in the handset which you use stripette tips with and you control the volume, multi channel pipettes, it all depends on the application
827850
I don't know if you are talking about Gameboy, cell phones, PDAs, or flatscreen TVs...but here are a couple of generic ones.\n\nPros:\n- Easier communication\n- More fun\n- Increased safety if used right (CC TV, parents can contact their kids at any time)\n\nCons:\n- Dangerous if used wrong (talking while driving, lack of concentration)\n- Tend to keep kids indoor (i.e. leading to less outdoor exercise)
860148
Personally I detest it. However, I find it a necessary evil since my husband and I own our own electrical company that offers 24 hour service. We get a lot of calls on our cell phones at night since we have our land line forwarded to our cells when we are not at the office. However, we always put our phones on silent/vibrate when we are in a public place. That way we don't disturb anyone around us.
60886
(hm hm condenser...you must be old school)well we can and kind of have in ways. Helmholtz described charge starge devices that are largely used today as "batteries" for memeory backup. such a charge storage device has great capacity and unlike the capacitors it can be put in series to increase bothe input and output voltage. the internal dielectric is not very great so there is considerable leakage compared to a tradition electrolytic. the scheme used today comprises as a layer of activated charcoal a dielectric layer and then another charcoal layer. you can buy these easity in small units that are as muc as a few fards and a few voltas. \nwhen the lighting strikes, though, the power factor is so low that the internal wiring are likely to burn out. there is c acomapnay, (i dont remember the name), is designing such "batteries" as a methos for propelling vehicles. i think the name of the comapny is Maxwell (not be confused with Maxell).\ni personally have experimented in creating such batteries that store energy as dc but when released it is AC! such a battery would be used in vehicles with more efficient motors and safer too. An ac battery of course would require controls and would use similar schema as what Helmholz described.....\nthere is a great book on Helmholz publised by UC press that leaves one to think that this amn knew way more than einstein ever did and his genius out stripped einstein and leaves him in the dust.\nalso one does no need lightning. therer are enough free electrons in the air to creat a good chrage over time. take a CRT from stock never used is ok, and touch the anode dimple. knocks you right back. that is a charge from the air.
170833
they are called junction boxes. they house all the telephone wiring for making connections. its like a service panel for the telephone workers. it can cover a 2 block radius at times. hope this helps.
1166605
1)Teflon coated at the base.\n2)Steam option for Pressing.\n3)lower energy consumption through power electronics control.\n4)armoured cable \n5) forced cooling after work is over