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Electronics Engineering
Electronics Engineering is a branch of engineering that deals with practical applications of electronic components, devices, systems, or equipment. Electronics are devices that operate on low voltage sources, as in electron tubes, transistors, integrated circuits, and printed circuit boards and use electricity as part of its driving force.
24,372 Questions
What are the examples of insulator and conductor?
The difference between a conductor and an insulator is that a conductor allows electrons to travel. This is because the "outer electrons" of a conductor are not anchored like those of an insulator. Conductors tend to be metals.
Some examples of insulators are plastic, glass, rubber and wood.
Why does fruit conduct electricity?
All fruit has some moisture and, for that reason, all will conduct electricity to some extent. Fruits that conduct electricity best will be those that are juicy with lots of dissolved acid or salts. On a 1 to 10 scale where 10 is best: roasted nuts and banana chips are 1; citrus and tomatoes a 10. Do a web search for "electrolyte".
How do you load a 1859 sharps carbine?
The sharps 1859 is neither a breakable design gun nor does it use cartridges. (at least nothing like we understand in common as cartridge)
It is a "falling block" design percussion rifle with breach loading. You open the breach by pulling the lever down; place the bullet into the barrel from behind, fill the chamber with black powder (black powder only!!!) completely full, close the breach, place a cap on the piston, cock it an fire.
Normally there were used paper cartridges instead of loose black powder, where the black powder was inside a paper roll and the twisted end of the paper roll was cut off by the block when closing the breach.
later on, also metal tubes with a hole at the bottom (similar to cartridges) were used to hold powder an bullet, which was but still fired by percussion caps.
Another thing is that there are replicas of this rifle made so you can fire it if you buy one.
How is information stored magnetically on a hard drive?
A hard drive is "hard" and "driven" mechanically. At one time computers were limited to tapes, then floppy disks then hard disks.
Actually, that is not correct. The various dates of introduction of the magnetic bulk data storage technologies is as follows:
- metal tape, 1951 (very heavy, a small reel of tape weighed over 10 pounds but did not bend or stretch left residue in the drive requiring frequent cleaning)
- plastic tape, 1952 (much lighter and soon made metal tape obsolete but could bend and stretch)
- hard disk, 1956 (first drive had 50 platters 24 inches in diameter in a stack 48 inches tall, the seek time was 0.8 seconds and the capacity was 5000000 six bit BCD characters; disk coating was a slightly modified formulation of the paint used on the Golden Gate Bridge in San Francisco, CA)
- floppy disk, 1971 (designed only for loading microcode into IBM System/370 computers at initial startup, never intended to be kept in the drive longer than a few minutes, original capacity 80000 bytes)
These all work in a similar manner. The trouble with tapes and floppy disks is that they bend. This distorts the signal stored on them limiting the speed information can be written.
A hard disk, on the other hand, is made of metal (aluminum) and doesn't bend so much meaning the signal is a lot more consistent.
There are several disks (flat, circular pieces of metal, called platters) inside a hard drive that spin quite fast. These disks have a fine coating of a substance which can be magnetised easily such as Iron oxide or Chromium dioxide. Next to these disks there is a read/write "head". This consists of a small bead of ferrite material with a coil wrapped around it. As the hard disk spins, air close to the disk keeps the head from actually coming in contact with the disk but it is close enough to do its job.
When small pulses of electricity are passed through the coil around the ferrite bead, it causes a magnetic field. This magnetic field, in the bead, magnetises the surface of the disk. A simple way of recording data is to record a magnetic pulse for a 1 and a reverse pulse for a zero. 1s and 0s are part of the binary number system which is used throughout the computer. It is only converted back and forth between binary and decimal when you type things in or read them on the screen. Even then, it is really still binary in groups called bytes (8), words (16), double words (32), quad words (64) tbytes (80) and so forth.
These days there are much better and faster ways of recording data than simple pulses for 1 and 0. There are a number of systems including, NRZ NRZI, FM, MFM, dibits and many more.
Difference between line driver and push pull circuit?
Line Driver
A line driver is a sourcing output. When in the on state, a line driver will supply Vcc. In the off state, a line driver will float. Because of this, a sinking input is required for proper operation.
Open Collector
An open collector is a sinking output. In the off state, an open collector will supply a path to ground. When in the on state, an open collector will float. For proper operation, a sourcing input is required. Push-Pull
A push-pull output is a combination of a line driver and an open collector. In the off state it will supply a path to ground and in the on state it will supply Vcc.
What does clamping voltage of a metal oxide varistor mean?
Clamping voltage, also referred to as let through voltage or the Voltage Protection Rating (VPR), is the amount of voltage a surge protector permits to pass through it to the attached load (ex: a TV) during a surge event.
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when a pulse of excess electrons and excess holes are created at a particular point in a semiconductor an induced internal electric field will be present between them. This internal electric field will cause the negatively charged electron and positively charged hole to drift or diffuse together with a single effective mobility or diffusion coefficient.
110v x 3.2 a=352 watts time 5= 17600.00 watts or 353 watts per hour
pipelining
Was the first amplifying tube a triode?
If by triode, you mean "a three-electrode tube", then yes.
You need a source of current into the device, a control electrode, and an "outlet" for the controlled current.
Although there were radically different types of construction, all early amplifying tubes were triodes of some kind.
What are the precautions using current transformer and potential transformer?
Secondry of CT should never kept open during functioning
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You use a combination of Ohm's law ( V = I * R ) and the power formula ( P = V * I ).
- Substituting you get: P = ( I * R ) * I = I**2 * R
- Dividing both sides by R you get: P / R = I**2 * R / R = I**2
- Taking the square root of both sides you get: SQRT( P / R) = I
- Swapping sides of the equals sign you get: I = SQRT( P / R )
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What do you mean by a static function?
In Java, a static function is not attached to a particular object, but rather to the whole class.
For example, say we have the following class:
class Song {
String song;
void printSong() {
System.out.println(song);
}
static void printStaticSong() {
System.out.println("This is a static song. It has no tune.");
}
}
The static function Song.printStaticSong() can be accessed without creating an instance of the Song class (using the "new" keyword)
However it cannot access the members of Song (such as song), since it is not an instance of that object.
Sound energy travels in waves and is measured in frequency and amplitude
The right hand rule is a simple way to find out the direction of the field surrounding a current carrying conductor.
Point your right thumb in the direction of the current in the wire (which flows from high to lower voltages) and curl the other fingers as if around the wire; the curled fingers define the direction of the magnetic field generated.
CommentIt might be worth pointing out that the above answer applies for conventional flow, not electron flow.
around 10.05pf
How is much is a thousand quadrillion?
Expressed in short scale, a thousand quadrillion would be called a quintillion. It would equal 1 followed by 18 zeroes - 1,000,000,000,000,000,000.
Expressed in long scale, a thousand quadrillion would equal a 1 followed by 27 zeroes - 1,000,000,000,000,000,000,000,000,000.
Let K1 & K2 be the equivalent capacitence in series and parallel resp.
if c1 and c2 b the values of capacitor we have
1/c1+1/c2=1/6
c1+c2=25
solving we get c1=10 MF c2 =15 MF or vice cersa
What is the difference between single port ram dual port ram and pseudo dual port ram?
The difference between single port RAM and dual port RAM is that single port RAM can be accessed at one address at one time, thus you can read/write only one memory cell during each clock cycle. Dual port RAM has ability to simultaneously read and write different memory cells at different addresses.
SPRAM uses a 6 transistor basic ram cell, while the dual port ram cell uses 8 transistor cell for memory. so the area of spram is much smaller than the area of dpram cell. To gain the advantages of both spram (less area) and dpram ( high speed) Pseudo dual port ram is introduced. which can read and write the data in the same clock, using rising and falling edges for the operations respectively, and using spram memory cell for the storage of data.
What is the importance of TTL compatibility?
the ttl compatability is nothing but the time to live factor of a packet in the dns system
