Write a note on intrinsic and extrinsic semiconductor?
Intrinsic semiconductor means pure form of semiconductor in this no addtition of impurity.but ext is not pure semicnductor,in this add the impurity which is p-type or n-type .Due to dopping,(adding impurity)excess electorn or photon created in crystal of atom creation of electron or photon depend on dopping material
What happens if you power a 120v light bulb with 300v?
Of course this is a bad idea. It will likely look like a flash bulb and may explode the glass. Do not do anything like this.
Why rectangular pulse cannot be sent in ssb modulation?
In theory it can but requires infinite bandwidth. A square wave (or pulse) is a combination of the fundamental frequency and the odd harmonics. If you send a square wave of 1kHz, you need to also be able to send 3kHz, 5kHz, 7kHz, 11kHz ....... etc. Since the bandwidth allowed for most SSB transmissions only allow up to 3kHz bandwidth, all you get is the fundamental of a 1kHz sin wave. On the other hand, if you send a 200Hz tone you can send 200Hz, 600Hz, 1kHz, 1.4Hz, 1.8Hz, 2.2kHz 2.6kHz and this combination will look a lot more like the original 200Hz square wave tone.
By what means are images reproduced in digital devices?
It has a minicomputer inside that records light onto a two-dimensional array of points. Each of these points is then assigned a digital value. In general all digital devices work on the same principle.
When using a multimeter to measure a dc current are the terminals polarity conscious?
Yes, if they are reversed the reading is also reversed. On a digital meter this will usually be displayed as a negative value, but on the older style mechanical analog multimeters it may actually damage the meter by "pegging" the needle in the backwards direction and bending it causing all future readings to be wrong.
What type of transformer is used in a phone battery charger and its ratings?
Usually these "wall wart" chargers are small switching regulated power supplies, not transformers. A transformer may be part of the switching regulator circuit, but it is only one small part of it.
The ratings of the switching regulated power supply will vary with different types of phones, but are always printed on a label on the "wall wart" casing. Read the label.
What are the uses of transformer?
1.) It can rise down the level of level of Voltage in an AC Circuit.
2.) It can build or decline the estimation of capacitor, an inductor in an AC circuit.
3.) It can accordingly go about as an impedance exchanging gadget.
4.) It can be utilized to keep DC from going from one circuit to the next.
5.) It can seclude two circuits electrically.
Where can you buy game designing software to make your own video games?
There are a few places. You can check http://www.yoyogame.com or http://www.thegamecreators.com for some. Yoyogames has a free game creator called Game Maker, which is free and can make 2d and basic 3d games. On The Game Creators website, you can find some cool game makers for 2d and advanced 3d games, and most are easy to use, and it has good level makers and model makers.
Will a 4 ohm sub work on a 8 ohm system?
With system you mean the output impedance of an amplifier. No Problem to do this, but there are really no amplifiers with an output impedance of 8 ohms on the market. All loudspeaker amplifiers have an impedance of less than 0.5 ohm. Scroll down to related links and look at "Impedance bridging - Wikipedia".
How do you select electronic component for designing electronic circuit board?
The best way is still to follow the advice that was given to Richard Feynman for selecting gears in the mechanical analog computers he designed for the US military at the beginning of WW2 before joining the Manhattan Project: "...select from the middle of the manufacturer's catalog, because the ones at the beginning and end are hard for them to make reliably, if they were not then they would not be at the beginning or end of the catalog...". This applies just as well to electronic components now as it did to gears back then.
How defrost refrigerator works?
A small colony of dwarves are hidden in the posterior portion of your freezer that come out at night with small hammers and chisels to remove the ice.
Those are the more performance-minded shift patterns for the transmission. Your Legend's transmission has 4 gears when shifted to "D" for Drive. S3 limits the tranny to 3 gears and S4 allows using 4th gear. The big difference between Drive and the "S" gears is that both S3 and S4 settings will allow the car to stay in a lower gear a little longer. Use this to your advantage when wanting to accelerate harder (such as passing another car) or when going down inclines (use the engine's natural resistance to help you maintain a safe speed and save your brakes for when you really need them). The "S" settings will typically result in lower gas mileage. When shifted to the "S" setting, the car will always default to S3 and you have to press the S3/S4 button to get it to use 4th gear. Pressing the same button again will put you back in S3.
How do you test a back pressure transducer?
make sure you have vaccum to the transducer, i believe there will be 2 hoses coming from the throttle body. make sure that the metal line that connects to the bottom of the transducer is not clogged with carbon. if you have vaccum and that line is clear, take the hose that goes to the egr vsv solenoid off the transducer and rev the engine up. if it is good you will have vaccum through the transducer, if its bad no vaccum will be there.
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How does your video game controller know when to vibrate?
When something happens in-game that is suppose to make your controller vibrate, or "rumble", the code in the game sends a message to your controller to tell it to send a current of electricity through the "rumble-pak" - making it feel like it vibrates.
It wasnt until early 2000 that the first standard controller came with a build-in Rumble Pak. Before that not every game controller could rumble, some controllers that allowed for an add-on devices to be connected to the controller, such as the Dreamcast and Nintendo 64, had small things that was called "Rumble Paks" that you stuck in to a slot on the controller to make it vibrate when the games told it to.
Not every game supported a Rumble Pak though so it was often described as a feature on the box saying that a rumble pak could be used with the game.
Can you replace an 8 ohm speaker with a 4 ohm speaker?
Only if your amplifier is capable of driving a 4 ohm speaker. Some have a switch on the back to select 4 or 8ohm speakers. Details should either be printed some where on the back of the amp or the instruction manual
Why keep a voltage transformer secondary open?
it is keep open so as to supply voltage to the load
AnswerThe secondary winding of a transformer is NOT necessarily kept open, unless you want to disconnect its load.
Are printed circuit boards poisonous?
The short answer is no, but be careful anyway.
The board itself is made of paper and epoxy resin which is not toxic but is not good for you. The real problem is the components on the board and the solder. All solder on older boards will contain lead, but most newer boards use lead free solder as much as possible. Electrolytic capacitors if they burst can release corrosive chemicals and many other components contain mercury, gold, silver and various heavy metals. In other words don't eat it and be sure to wash your hands after handling before you eat or smoke.
There are often flame retardants that are hazardous (carcinogenic) in PC boards.
What is the envelope of a signal?
The envelope of a signal is the "apparent" signal seen by tracking successive peak values and pretending that they are connected.
Normally, this question involves amplitude modulation of a radio frequency carrier by an audio frequency signal. The two frequencies involved are very much different - 20 kHz versus 1 mHz, for instance, and this "envelope" effect will be very noticable on an oscilloscope.
What is a fact for parallel circuits for kids?
A parallel circuit is a circuit that takes both legs to make a load.
If we give more than 4.8 volt to a diode in reverse bias condition it will break down or destroyed.
What waves transfer from one place to another?
All waves can travel from one place to another as long as they have a medium to travel through. The only waves that do not need a medium are electromagnetic waves. When using the word "transfer" though. Waves transfer energy; waves themselves are not transfered they simply travel.