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
Most control signals in electronics are active-low signals (usually reset lines, chip select lines and so on). This stems from the fact that most logic families can sink more current than they can source, so fanout and noise immunity increase. (The reason for this is ultimately related to the fact that electrons are negatively charged.) It also allows for wired-OR logic if the logic gates are open-collector/open-drain with a pull-up resistor. Examples of this are the I²C bus and Controller Area Network (CAN).
What happens if field winding of a running dc shunt motor suddenly breaks open?
when the field winding of a running dc shunt motor suddenly breaks open the motor fails to run because in the motor the stationary winding is armature and rotatory is field winding
Why current in series combination is constant?
Normally, but if the circuit has capacitors this is not necessarily true.
Another viewpoint:
No. The current doesn't have to be constant in a series circuit, It can grow, shrink,
wax, wane, switch on, switch off, or wander randomly about. But whatever it is,
it must be the same at all points in the series circuit.
It is the pure sine wave signal with no modulation (data, information). It doesn't vary in amplitude or frequency. Not really a signal yet, which implies information. Call it a wave.
From there, we have:
CW- Morse code by turning the carrier on and off
ICW- the I means interupted, close to the same as CW
MCW- still coded but by Modulating the carrier with a tone.
AM- the amplitude is modulated (by voice or tone) Basic voice- but creates sidebands
FM- The frequency is modulated...
SSB-Single sideband. Like AM but without the carrier and one sideband. Low bandwidth, low power.
FSK- Frequency shift Keying, where the frequency of the modulation source is shifted hi to lo in ASCII, for teletype communication via radio links..
At this point a bit more complex....
How do you work a flow transmitter?
A device used to measure the flow of liquids in pipelines and convert the results into proportional electric signals that can be transmitted to distant receivers or controllers.
a velocity over a known surface area is measured and then it can be converted to volumetric flowrate or mass flowrate if the density of the fluid is known.
Is electronics and communication and electronics and telecommunication the same?
Electronics and communication and electronics and telecommunication are same but they have little difference. Electronics and communication deals with all type of communication technologies while the Telecommunication branch deals with only telecommunication those are-
Telephony
Telegraphy.
Explain the difference between electronics and electricity?
Electronics is a science dealing with electrons emission
electrical is a science dealing with electron flow
Can you wire 2 16 ohm speakers to 16 ohms?
No. Two 16 ohm speakers connected together are either 32 ohms, if wired in series, or 8 ohms, if wired in parallel.
You can, however, connect four 16 ohm speakers in series-parallel to get 16 ohms, with four times the power handling capacity of just one.
What is the direction of current flow in a diode valve?
Inside the diode valve the conventional curret flow is from anode to cathode. The electron flow is from cathode to anode.
What is the function of the OR gate?
use to control signals in many circuits.
it finds the maximum between two binary digits
Care must be taken to ensure that the relay does not operate from the spill current resulting from unequal CT saturation during motor starting, where the high currents involved will almost certainly saturate the motor CT's. It is common to use a stabilising resistor in series with the relay. The effect of the stabilising resistor is to increase the effective setting of the relay under these conditions, and hence delay tripping. When a stabilising resistor is used, the tripping characteristic should normally be instantaneous. An alternative technique, avoiding the use of a stabilising resistor is to use a definite time delay characteristic. The time delay used will normally have to be found by trial and error, as it must be long enough to prevent maloperation during a motor start, but short enough to provide effective protection in case of a fault.
How do you create an electromagnetic pulse EMP?
Detonate a high yield nuclear device in the upper atmosphere or just outside of the Earth's atmosphere.
EMP was discovered at the US Nuclear Tests at Bikini Atoll when it knocked out power for a short time as far away as Hawaii.
Why generally the voltage is applied to HV side?
Lower voltages are required if connected to the low voltage side. The testing facility may not have a gen set large enough to test from the high voltage side.
What are radiowaves and how they are formed?
Radio waves Radio waves are electromagnetic waves occurring on the radio frequency portion of theelectromagnetic spectrum.
Discovery and utilization
Radio waves were first predicted by mathematical work done in 1865 by James Clerk Maxwell. Maxwell noticed wavelike properties of light and similarities in electrical and magnetic observations. He then proposed equations, that described light waves and radio waves as waves of electromagnetism that travel in space. In 1887, Heinrich Hertzdemonstrated the reality of Maxwell's electromagnetic waves by experimentally generating radio waves in his laboratory. Many inventions followed, making practical the use of radio waves to transfer information through space. Nikola Tesla and Guglielmo Marconi are credited with inventing systems to allow radio waves to be used for communication.
For more information go to:
http:/en.wikipedia.org/wiki/Radio_waves
What is the frequncey in which 2gmobile oprate?
Frequency is the number of times per second at which an electromagnetic wave oscillates. It determines the wave's properties and usage. Frequencies are measured in hertz (Hz). 1 Hz is one oscillation per second, 1 kHz a thousand, 1 MHz is a million and 1GHz is a thousand million. Frequencies between 30 kHz and 300 GHz are widely used for telecommunication, including broadcast radio and television, and comprise the radio frequency band. Mobile telephony systems currently operate at 900MHz, 1800MHz and 2100MHz. GSM - Global System for Mobile Communications or Groupe Speciale Mobile is the international, pan-European operating standard for the current generation of digital cellular mobile communications. It enables mobile phones to be used across national boundaries. GSM systems are operated by O2 and Vodafone at 900 and 1800 MHz, and by T-Mobile and Orange at 1800MHz.
I assume the primary has 12 volts applied.
The voltage ratio from primary / secondary is equivalent to the turns ratio = 10/20, so the primary voltage is 1/2 of the secondary voltage.
The secondary voltage is 24.
What is the unit that electrical power is measured in?
Answer: In SI, all forms of energy is measured in joules. An alternative, but non-SI, unit is the kilowatt-hour. A kW.h is equivalent to 3.6 million joules.
In the UK, energy companies charge their consumers 'per unit', rather than 'per kilowatt hour'. In this context, a 'unit' is short for 'Board of Trade Unit', and is used to measure the consumption of electrical energy. A unit is exactly equal to a kilowatt hour, which is the amount of energy consumed, over a period of one hour, at a rate of one kilowatt.
Answer: It depends what aspect of electricity you want to measure. The above answer is for energy; however, in electricity you also use other units including ampere (to measure current), volts (to measure voltage), ohms (to measure resistance or impedance), hertz (to measure frequency), and several others.
Can a conductor be given limitless charges?
No, in theory I guess you could give it enough to fill all valence electrons in all of the atoms in the conductor, but practically this could not be achieved.
What kind of signal type is a paracrine?
Paracrine signaling is a form of cell signaling in which the target cell is near ("para" = near) the signal-releasing cell.
A distinction is sometimes made between paracrine and autocrine signaling. Both affect neighboring cells, but whereas autocrine signaling occurs among the same types of cells, paracrine signaling affects other types of (adjacent) cells.
What is VHDL program for 64 to 1 multiplexer using four 4 to 1 multiplexers?
Personally describing VHDL code for multiplexer can be quite difficult without prior knowledge. It takes many VHDLs to be a multiplexer.
What is the formula for inductors in series and parallel circuit?
Inductors in Series - L total = L1 + L2 +L3. Inductors in Parallel - 1/Lt = 1/L1 + 1/L2 + 1/L3 Resistors in Parallel - 1/R total = 1/R1 + 1/R2 + 1/R3 Resistors in Series - R total = R1 + R2 + R3
What is a flexible printed circuit?
Flexible printed circuit is a printed circuit etched on a flexible laminate material. Mostly we see rigid printed circuit boards around e.g. a PC motherboard and cards in a PCI slot of PC. Flexible circuits were originally developed to replace bigger wire harnesses but now ae used extensively in small electronic devices like camera, media players and so on. These can be built with varying degree of flexibility and semi-rigid form based on design needs.
Originally only single sided flexible circuits were in use but with advances in technology, need for controlled impedance high speed interconnects and more miniaturization needs we now have a variety of flexible printed circuits including multi-layer ones and ones which are combined with rigid PCBs for achieving specific design needs.
The current in a what circuit is the same at every point?
A series circuit has the same amount of current at all points in the circuit.
CommentIt's not simply 'the same amount of current at all points''; it's the same current at all points.
