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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
How the current flow in parallel connection?
In a parallel circuit, the current flow is independent in each branch.
Ohms Law! E=IR Voltage equals current times resistance. Get out the old calculator...
Is the total voltage drop around a series circuit equal to the voltage of the battery?
No. The total voltage drop around a series circuit, per Kirchhoff's voltage law, is zero. However, it is true that the total voltage drop of all of the components except the battery is equal and opposite to the voltage drop of the battery.
AnswerInterestingly, the formal definition of electromotive force is based on Kirchhoff's Voltage Law: 'A source's electromotive force is equal to the sum of all the voltage drops around a closed loop, including the source's internal voltage drop'.
Expressed as per the original answer, we could also say; 'The algebraic sum of a circuit's electromotive force and voltage drops, including the source's internal voltage drop, is zero'.
Explain the construction and working of ruby laser?
Ruby is an aluminum oxide crystal in which some of the aluminum atoms have been replaced with chromium atoms. Chromium gives ruby its characteristic red color and is responsible for the lasing behavior of the crystal. Chromium atoms Absorb green and blue Light and emit or reflect only red light. For a ruby laser, a crystal of ruby is formed into a cylinder. A fully reflecting mirror is placed on one end and a partially reflecting mirror on the other. A high-intensity lamp is spiraled around the ruby cylinder to provide a flash of white light that triggers the Laser action. The green and blue wavelengths in the flash excite electrons in the chromium atoms to a higher Energy level. Upon returning to their normal state, the electrons emit their characteristic ruby-red light. The mirrors reflect some of this light back and forth inside the ruby crystal, stimulating other excited chromium atoms to produce more red light, until the light pulse builds up to high power and drains the energy stored in the crystal. The optically pumped, solid-state laser uses sapphire as the host lattice and chromium as the active ion. The Emission takes place in the red portion of the spectrum.
Why current remains same in series?
An electrical current is a flow of charge through a circuit. In a series circuit there is only one path for the charge to flow through; therefore, (in a DC circuit) the same charge must pass through every point in the circuit.
It's not quite the same as flow in a water pipe. In a water pipe if you increase the flow of water at the intake end it will take some time for that increased flow to makes it way to the output of the water pipe. In an electrical conductor, changes are effectively instantaneous. As soon as you change the input flow the output flow changes too, and that implies that the flow at all points in between the input and the output have to be the same.
Once you see that please remember that this is the 'ideal'. The situation becomes considerably more complicated once you started learning about other circuit elements.
A: A gate any gate make logical decisions to pass or not to pass a true or a false. Since a gate must have two inputs to be called a gate for an OR gate any true '1' signal will pass trough which is opposite to an AND where any false '0' will pass trough
What are the Advantages of digital transmission over analog?
Hi,
1) Digital signals do not get corrupted by noise etc. You are sending a series of numbers that represent the signal of interest (i.e. audio, video etc.)
2) Digital signals typically use less bandwidth. This is just another way to say you can cram more information (audio, video) into the same space.
3) Digital can be encrypted so that only the intended receiver can decode it (like pay per view video, secure telephone etc.)
There are others, but this is three of the biggies.
Hi!
Following are the Advantages of Digital Transmission over analog transmission.
1. The signal is exact. For example, Digital formats like PCM (Pulse Code Modulation) can hold the exact digital format of sounds.
2. Digital signals can checked for errors. Generally, all digital transmission methods use 'head labels' to provide better checking facilities. Head label may contain how many packets may need to complete the transmission, what is the sequence number of each packet of data, acknowledgment labels etc.
3. A variety of services can afford over one line. For example, IpTV connection can used to watch cable TV channels while browsing the Internet through a PC using same line. This line can also used to make a phone call at the same time.
4. Digital data can be compressed and therefore possible to pass over higher bandwidths. Any digital data; data, image, video, voice can be compressed.
5. More secure. Digital data can be encrypt using an encryption method. Only the dedicated receiver can decode the message.
6. Supports data integrity. Simple to integrate voice, video and data. Digital transmission provides easier way to integrate different digital formats.
7. Digital transmission provides higher maximum transmission rates via medium such as optical fibers. Typically, digital transmissions use less bandwidth.
Hope this will help you!
(H.W Thushara Indika from Bandarawela - Sri Lanka)
well, this is very simple to understand ,
the DC load line of a circuit is nothing but the Kirchoff's voltage law on the out put circuit of the transistor-amplifier. As the KVL is linear equation involving voltage drops the equation of load line is a straight line
let us assume that the transistor is in CE configuration.
VCC-VCE-ICRC=0v
ICRC=VCC-VCE of the form by=aX+c which is in the form of a straight line with positive intercepts on X(VCC) and Y(VCC / RC) axis and a negative slope
where,
x= VCE/RC
y= IC
m(slope)= -VCC/RC
What is the operation of isolator?
An 'isolation transformer' is a 1:1 ratio mutual transformer. It electrically isolates the secondary circuit from the primary circuit without changing the voltage level. A bathroom shaver socket uses an isolation transformer.
A seven segment display is a device used to display numbers and letters on things such as alarm clocks. A 7 segment display is simply seven LEDs packaged in a pattern that allows numbers and letters to be displayed by illuminating different sets of LEDs.
https://www.youtube.com/watch?v=kveP66YZyKg
in the IC-7805 i need a meaning for the number 7,8,0,5 seperately
Who invented the Graphing calculator?
According to the Wikipedia article (see related link), Casio released the first graphing calculator in 1985.
What is the working principle of speedometer?
this is good to know that there is a way i can find somthing usuful for mi studies
How do you test diode using multimeter?
A Diode will pass the electrical current into one direction, and will produce high resistance in the opposite direction. To check a diode, use an Ohm-Meter or a "multi meter", and set to measure resistance "Ohm", in the 1k Scale. You will have two leads in the ohm meter + and - (Red and Black) If you measure the resistance in one direction ( red lead touching one of the diode leads , and the black is touching the other lead ) , and you found a low resistance in one direction, and a very high resistance in the other direction ( by reversing the red/black leads) , this diode should be ok. If you find low resistance in both directions, this diode is shorted, and is damaged If you find high resistance in both directions, this diode is open circuit, and is damaged
What is the difference between a Doppler radar and a regular radar?
Normal radar sends out radio waves to determine the location of an object.
Doppler radar can not only find the location of an object or storm, but using something known as the Doppler effect can determine how fast it is moving towards or away from the radar.
What are transfer characteristics of rectifier?
Transfer Characteristic basically is relation between output and input of a electronic circuit. So in case of a series circuit in which a diode and a resistor are in series and the output voltage (Vo) is being measured accross resistor the relation between Input voltage (Vi) and Output voltage (Vo) will be Vo=Vi. When the we will represent it graphically we will get a straight line graph.
What is differents between 4 ohms 8 ohms?
It has to do with the load on the amplifier, you can't hear the difference.
How does a technician discharge static build up?
A; By wearing a wrist strap connected to chassis and grounding the chassis to earth ground
What is the difference between gray code and binary code?
There are just two binary digits, which are 0 and 1. "Binary digits" is often shortened down to "Bits". Putting binary digits together you can make up the codes that are used to store various characters from your keyboard.
For example the binary code for "A" is 01000001. In decimal that would be 65. For "a" the binary code 01100001, which is 97 in decimal. The letters, digits, punctuation symbols and other characters on your keyboard, as well as ones that don't appear on your keyboard, but would in other countries, all have binary codes. This is the way they are stored in your computer. It is possible to get some of these other characters by using the decimal equivalent of binary codes.
If you are using a PC, open up Notepad, which you should get through Programs and Accessories from your Start menu. On the right side of your keyboard is the numeric keypad. Make sure the num Lock light is on. Press and hold down the Alt key, which is on the left of your space bar. Keeping it held down, on the numeric keypad, not the numbers across the top of your keyboard, type 65 and then let go of Alt. You should get an A. Try it again with 97 and you will get a. Try any number between 0 and 255 and you will get various characters, including ones that are not on your own keyboard. These will include letters from other alphabets like é (130) or â (131), or symbols like the one used for temperature ° (248) and many others. apex.. chaos
What is the difference between optical bandwidth and electrical bandwidth?
Read this artical
http://www.picometrix.com/pico_products/an_band_terms.asp
Show you a model for ieee format for paper presentation for engineering presentation?
biomedical based projects
