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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 does voltage and current affect resistance?
No, resistance is not affected by either voltage or current. Reading the various answers to similar questions on this topic, there seems to be a misunderstanding of Ohm's Law in which people think that, because R = V/I, then a change in either voltage or current must cause a change in resistance. This is most definitely not the case. This is because resistance is the constant of proportionality in the equation. The equation, quoted, merely tells us what the resistance of the circuit happens to be for a given ratio of voltage and current.
Resistance is only affected by the length, cross-sectional area, and resistivity of the conductor. Because resistivity is affected by temperature then, indirectly, temperature also affects resistance. So, if the current flowing through a conductor causes its temperature to change, then so, too, will its resistance -but, it is the temperature that is causing the change in resistance, not the current.
Can 3 tripleA batteries charge an Iphone safely?
An IPhone, or any rechargeable device, for that matter, should only be charged with the specific charger that was designed for it. This minimizes the risk of overcharging the batteries and damaging them.
Why do the cell-phones use higher frequency bands Ghz and not lower ones Khz-Mhz?
The lower bands are already in use, and have been for many years. Additionally, the higher frequencies allow the use of very small antennas and some other components that reduce the size of the phones. Microcircuits for microwaves.
Is password to connect your wireless internet connection to ipod touch the security key?
i hav a lap top but it is asking me sucurity key or pass phrase were do i find this
Answer to the above: The security key is the password blocking you from access to your internet. These are either WEP OR WPA Encrypted. To find this out Type 192.168.0.2 (or something similar) in the address bar on your internet browser and type the username and password on the back of your router. This should bring up your routers webpage which if you click on security will have your key stored there.
What do you need to build a circuit?
The things needed to build a circuit are:
- Circuit elements like resistor capacitors, inductors etc
- Connectors (cables)
- A source
Where to see resonance on sonar lofargram?
Harmonics are often seen on shaft and blade signatures of surface ships and become broad and diffused with cavitation. also main electrical power sources will show harmonics related to pole pairs on the motors etc.
What is the meaning of locational mobility of entrepreneurs?
Moving and settlement is in human nature but some communities are more mobile than others. Only few of the entrepreneurs are mobile. Their locational mobility depends upon availability of raw material and labor, experience, socio political information, etc.
It is the amount of refrigeration produced equal to the weight of ice (1 T, 1.5T or 2T etc.) melted in 24 hrs.
Ravi Sharma
ravisharma42@gmail.com
NDC application protocol on ATM?
http://www.kal.com/Products/Applications/ndc.htm NDC is one of the most widely used ATM communication protocols. Employing a mechanism of states and screens, it places the ATM under a high degree of control of the host computer with each transaction carefully 'managed' by the host-based application. This method of processing ATM transactions has served the banking industry well for the past two decades.
What are the feature that effect the frequency response of an amplifier?
all reactive elements in the amplifier, including stray capacitances and inductances.
What is the difference between a cam sensor and a coil sensor?
cam sensor senses position of cam .coil sensor operates coil
both 2 entirely different parts of engine
Who is the father of Electronics?
Michael Faraday(1791-1867)----Electronics
Claude Shannon(1916-2001)---Information theory
If the output of the operational amplifier is inconsistent with the inputs, then you are operating outside of the limits of the device. You might also have experienced lockup, a characteristic where the output locks in one state, but this still stems from operating outside of limits. Make sure the inputs are always within the specified range.
A nand gate becomes gate when used with negative logic?
negative logic means negative input values. so by checking the truth table, it becomes an OR gate
Is output of electric fence charger ac or dc?
The output of an electric fencer is a high voltage pulse of DC voltage.
Is 12 volts peak to peak the same as 12 volts ac?
No. 12 volts peak to peak would be 6 in the positive polarity and 6 negative polarity. Simply saying 12 volts AC would be 12 volts in each polarity or 24 volts peak to peak
If a 13 dB gain antenna has 2 watts of power at the input what is the effective radiated power?
40 watts
If you have unity power factor, p.f.=1, then the real power P must equal the total power S. Therefore, there is no reactive power being used, Q=0.
Alternative AnswerApparent power is the phasor (vector) sum of true power and reactive power:(apparent power)2 = (true power)2 x (reactive power)2
Are the interpoles in a DC motor connected in series or in parallel with the armature?
Hi,
Always interpoles are connected in series with armature.
N.V.B.V. Prasada Rao
Does a cathode ray tube resemble the tubes used in transistor radios?
Transistor radios have NO tubes. They have (guess what) transistors.
How would you wind a coil which has a resistance but essentially no inductance?
I wouldn't. I doubt this is possible. Wire, by definition will have inductance. The inductance will increase as the frequency increases, so I guess you could specify a frequency that is extremely low to use the coil at.
What is the purpose of semiconductor over XLPE?
The purpose of the semiconductor over XLPE is to equalize the electrical stresses over a large area.
What companies manufacture led lights?
Anchor,Philips,Wipro,Havells are some of the led manufacturers
