0
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 normally open and close circuits?
The electric path which starts from the positive terminal of a cell or battery ends at its negative terminal, without any break, is called closed electric circuit or complete electric circuit. The electric path,which starts from the positive terminal of a cell or battery, is broken at some point, is called open electric circuit or incomplete electric circuit.
What is a material that has a high resistance?
Diamond, rubber, plastic, styrofoam, ice, wood, glass, paper, concrete.
How voltage gets converted into current in an ammeter?
A: It must be be understood that current needs voltage other wise it is zero. An ammeter for DC is always a voltmeter that reads small IR drop to convert that reading into current present. Like an ohmmeter needs volts to read ohm. Both reading are volts it just convert those reading into whatever scale is switch to.
What is the purpose of traffic signals?
For cicilization and without civilation we would all get confused, cause accidents on the road, and either get seriously injured or die.
What does FM stand for in radio frequency?
FM means Frequency Modulated.
FM stands for modulation on frequency or frequency modulation.
Why to use centre tapped transformer in bridge wave rectifier?
In a rectifier, a center-tapped transformer and two diodes can form a full-wave rectifier that allows both half-cycles of the AC waveform to contribute to the direct current, making it smoother than a half-wave rectifier. This form of circuit saves on rectifier diodes compared to a diode bridge, but has poorer utilization of the transformer windings.
How do you convert bcd into Gray code?
Hexidecimal (Base 16)
0000 = 0
0001 = 1
0010 = 2
0011 = 3
0100 = 4
0101 = 5
0110 = 6
0111 = 7
1000 = 8
1001 = 9
1010 = A
1011 = B
1100 = C
1101 = D
1110 = E
1111 = F
BCD (Binary coded decimal is just 0 through 9 above)
List of electrical core companies in chennai?
List of Embedded System companies in Chennai
1. ACME Technology Pvt Ltd
2. Agnie Consulting(I) Pvt.Ltd
3. Alcatel-Lucent Chennai
4. American Mega Trends Pvt.Ltd
5. Ansaldo STS India Pvt. Ltd, Chennai
6. Apna Technologies
7. Appasamy Associate
8. Aricent Technologies
9. Arista Automation Pvt Ltd
10. Ashva Technologies Pvt Ltd
11. Atheros Communications
12. Atmel
What effect does adding devices have on the resistance of a series circuit?
Many circuits have safety devices such as fuse. A fuse contains a substance that melts if it gets hot. if a short circuit happens, the heat causes the fuse to melt. The circuit is broken. because the current stops ,no damage is done.
Yes Ofcourse ,when a curren is allowed to pass through a conductor,"IT IS BEING SURROUNDED BY MAGNETIC FIENLD"....
Because it somehow behaves as the electromagnet as per FARADAY LAW OF ELECTROMAGNETIC INDUCTION.............
Can you explain the main function of the three parts of transistor?
individually, each part has no main function. it's when you use them in conjunction with one another that you get the amplification process. now for an example lets use a simple BJT, say 2N3904 is a NPN transistor. now to better understand picture a diode between the base and the emitter where the anode is at the base and cathode at the emitter. bias the collector at +5V and put the emitter at zero for reference (ground). now lets say you apply 3V to the base, it's going to kick on that "diode" between the base and the emitter and your going to get current to start coming from ground into the emitter. when that current hits the base its just going to keep going (such a small amount is lost through the base that we can ignore it, i'm talkin micro-amp range) the current just goes up through the collector and to your load. now this is an extremely basic example, you'll have to do much more in depth studies to fully under stand how it works.
Do mobile phones emit radiation only when receiving calls and SMS?
No. Cell phones may emit cellular radiation even when "idle". Smartphones may also emit radio signals for near-field, Wi-Fi, bluetooth, Ant, etc.
Details: They emit radiation (a digital microwave signal) when they are first turned on, then continue to "check in" with a cell hub (or cell hubs if you are moving) so you are constantly connected to a cell hub. Your phone is "always ready" to receive incoming traffic because it is being "tracked" by your cellular service provider so that the nearest hub can relay your calls. If you are stationary, a single hub probably does this. But if you are mobile, cell hubs "hand you off" as you move, and all based on your phone's "checking in" signals to the hub.
What are two uses for radio waves?
They are used for carrying information. Mobile phones, satellites, radio and TV broadcasting, cb radio, radars, GPS, deep space research - these are just a few examples of radio waves' possible applications.
A sweep generator is an instrument used to align IF circuits in older FM radios that used adjustable IF coils in the circuits. The generator "sweeps" the frequencies on either side of a set center frequency. When this signal is applied to the front end of an IF circuit, the responce from the IF circuit can be observed at the end of the IF with an oscilloscope allowing the IF coils in the circuit to be adjusted to the desired bandwidth and responce of the circuit.
How long in meters is a typical radio wave with a frequency of 88 megahertz?
The length of a wave is denoted by its wavelength, which is found by dividing the speed of light, or c, (3 x 108 m/s) by the frequency (88 x 106 Hz). The answer is 3.4 meters.
downlink
What is the Maximum clock frequency of 8086 microprocessor?
that depends on the microcontroller. check the datasheet.
How do you measure DC current?
A: By introducing a very small shunt resistance in series with the source and measuring the voltage drop which a meter will translate into current
How does a zener diode work in reverse bias?
Zener diodes operate like any other diode in reverse bias, they just have the point where they breakdown more carefully controlled, and usually lower than the typical ~50V for a standard silicon diode. The process by which most diodes (with breakdowns larger than a few volts) operate under reverse biases strong enough to cause breakdown is called "Avalanching".
Avalanching is where the reverse biasing is strong enough that the electric field between the positive and negative terminals grows to a point where the electrons and holes being swept across the junction have enough energy so that when they eventually release that energy it is enough to generate a new electron and hole pair which themselves are swept away by the electric field also.
Difference between BIOS and CMOS?
BIOS refers to (Basic Input Output System) it is responsible for booting of your system while DOS(Disk Operating System) is an operating system that user uses by entering commands in command prompt(to open in windows press start+r).
What is a disadvantage of using a parallel circuit?
While a parallel conversion minimizes the risk of major flaws in the new system causing irreparable harm to the business; it also means the cost of running two systems over the period must be incurred. Because running two editions of the same system on the computer could place an unreasonable demand on computing resources, this may be possible only if the old system is largely manual
How do you test solenoid by using multimeter?
The solenoid can be testing by connecting it to your car battery and making sure it operates. If it is working you should be able to hear it click and be able to blow through the vacuum ports while it is connected. If you have a manual it will also specify how much resistance should be across the two terminals. Below is an attached tech video that should also help.
