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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
Why potential difference at every point in parallel circuit is same?
Kirchof's Law - the voltages are measured between the same starting-point and end-point.
Can a 7.5 volt dc adapter be used for 9 volt dc speakers?
You may get some sound out of the unit but not at the fidelity that the manufacturer designed the speaker to produce.
What is the purpose of a transmitter?
FM GPS Transmitters use radio frequencies to track and locate objects from far away. They are more so common in vehicles and cellphones: http://www.gpstrackingdevice.net/Accurate-Tracking-With-FM-GPS-Transmitter-Devices.html
Relationship between phase and frequency modulation?
Wavelength lambda and frequency f are connected by the speed c of the medium. c can be air = 343 m/s at 20 degrees celsius or water at 0 dgrees = 1450 m/s. c can be light waves or electromagnetic waves = 299 792 458 m/s. The formulas are: c = lambda x f f = c / lambda lambda = c / f
What are the advantages of fp over loc?
Function points (FP) offer several advantages over lines of code (LOC) as a metric for measuring software size and complexity. FP focuses on the functionality delivered to the user, making it more aligned with business value and user requirements, whereas LOC is more about the implementation details. Additionally, FP provides a more consistent measure across different programming languages and development environments, which can help in comparative analysis and project estimation. This makes FP a more effective tool for project management and performance evaluation.
How do you intialize graphic mode in c?
Platform-dependent. For Turbo C, enter initgraph and press Ctrl+F1.
What is the current flowing through the cicuit of a 12 volt battery with a 3-ohm resistor in it?
Voltage (volts) is equal to the current (amps) times the resistance (ohms):
V = I*R
Thus, the current I = V/R = 12 V / 3 Ohm = 4 A.
Why are resistors useful in electric circuits?
The only reason i can think of this making sense is that it makes the calculation for total resistance easier. Other then that i can't see any benefit from having resistors with similar ratings.
The formula for finding total resistance in a parallel circuit is Rt=1/1/r1+1/r2+1/rn...
If all the resistors are the same, you can do the calculation in your head a lot easier.
to make a anoying noise when you walk
Ans.2 The noise comes from a type of shoes called flipflops - no hyphen.
Flip-flops have a variety of uses; the two common ones are
- To act as a 1-bit read write memory, often called a flag
- To divide a series of level transitions (or pulses). One flop will divide by 2. Two flops cascaded will divide by 4. A block of cascaded flops which are wired to reset to zero when a particular state is reached will divide by any desired number.
ANSWER: FLIP-FLOP are THERE to create logical functions in machine language like storing, counting, shifting.
What is the maximum value of a 220 ohm with a 10 percent tolerance?
242 ohms INCLUDES initial tolerance assuming no thermal drift aging etc
What are the safety hazards of electronic circuits?
there are several ways of safety hazards in electronic circuits those are those are -
1- capacitors are dangerous if they charged discharge it before handling.
2- the high voltages are present somewhere in electronic circuits like EHT on television mind these.
3> static charge of body can damage cmos ics don't touch them from naked hand.
4> ground all equipments before using them it will prevent from electric shock.
What happens in the depletion region in reverse bias?
in forward biasing depletion region width decreases and in reverse biasing it increases .
What is HT and LT current and voltage?
A 'bushing' is a tubular insulator used to insulate a conductor that passes, for example, from the inside of a transformer or circuit breaker to the outside, enabling the internal components to be connected to external supply lines.
High-voltage (or 'high tension') bushings have thicker walls and are longer than low-voltage bushings, as they have to withstand higher voltages.
How many transistors can you find on CPUs today?
The no.of transistor integraeted in the prosses..................
What is the current in a 100 volt circuit with 25 ohms of resistance?
Using Ohm's law V:IR .I:V/R..I:100/5-20...I-20ampere
Does electromagnet work only on DC?
They normaly are. AC ones tend to buzz.
The core has to be of soft iron or laminate, so that the field collapses properly when the current is switched off.
When adding resistance in a series circuit what happens to supply voltage?
In a series circuit...
Kirchoff's current law: The sum of the signed currents entering a node is zero. Since a series circuit consists of only nodes each connected to only two elements, this means that the current in every point in a series circuit is the same.
Kirchoff's voltage law: The sum of the signed voltage drops in a series circuit is zero. This means, that if you segregate the sources from the loads, the total voltage across all the nodes is equal to the total voltage across all the sources.
That may seem trite, but take the case where you have one battery in series with two resistors also in series. If you know the voltage across one resistor, then you know the voltage across the other resistor - it is the battery voltage minus the first resistor's voltage.
Ohm's law: Voltage is current times resistance. This actually applies everywhere; series circuits, parallel circuits, DC circuits, AC circuits, etc.
How do you design printed circuit board?
If you want to know a printed circuit board is designed here is the explanation in simple terms.
1. First you decide on the components which are in the design.
2. Need a software in which you can get symbols (both schematic symbols and physical symbols) of standard components and which also allows you to create your own symbols for new components which are not in the standard tool library.
3. In schematic capture tool, you will use symbols of components and also connect the pins of components with wire lines to complete the schematic drawing. Based on complexity and size of the design this can be few pages or hundreds of pages.
4. In the layout tool you will have to make a board outline (based on the shape/size of PCB you want to design) and define number of layers etc.
5. Schematics need to be exported to layout using the board outline you designed. Result will be that all the physical symbols will appear in the layout tool along with un-routed wire connections.
6. Now you can place components on the PCB based on floor plan (where you want to place what components) and start routing the connections. Decide thickness of routes or traces based on impedance and current these nets need to carry. Based on how many layers have been defined and needed as per design traces can run through multiple layers
7. When routing is complete, with help of tool you need to create PCB fabrication data for PCB fabricator.
These are top level steps involved in a PCB design. There are finer steps like back annotation (process to sync up layout and schematics) which also important. Many tools give options for auto placement, auto routing which can aid in the design. These used with proper constraints and care can help speed up the design process. Check for PCB tool vendor websites.
- Neeraj
AnswerProton led displays says:Go to www.circuitboards.com scroll down to the links area and click free cad software by cadsoft. My friend told me the other PCB designing software mentioned makes you pay for there software if you want it manufactured outside of there facility. Basically locking you into there price or no price. Cadsoft is free up to a certain layer count I believe.
How do you design 32 to 1 multiplexer b using a 4 to 1 multiplexer?
To build a 64 to 1 multiplexer using cascaded 8 to 1 multiplexer, use nine 8 to 1's. Connect the first 8 to each of the 64 inputs, then connect the ninth to the outputs of the first eight. Connect the three address lines of the eight together to form 3 of the address lines. Connect the three address lines of the ninth to form the other three, for a total of 6 address lines selecting 1 of 64 inputs.
This is a lot of logic. Fan-in and fan-out may be considerations. If you are trying to scan 64 switches, there may be a better way using an 8-bit output connected to a switch matrix (with diodes if you need more than one at a time close-able) and then connected to an 8-bit input. Even better, consider the 8279 keyboard/display controller.
What is the difference between baseband coaxial cable and broadband coaxial cable?
Iam pretty sure that baseband coax was 50 ohm and was used for networking computer, were broadband coax is 75 ohm and used in the cable tv industry.
A baseband signal is the original signal before it is modulated onto a carrier, mulitplexed or mixed.
A broadband signal contains many channels which have been modulated or multiplexed onto a common carrier.
The significant difference is the bandwidth of each.
The impedance of the cable which carries either of them is totally irrelevant to the definition.
