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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
What is the tolerance of a 47 microfarad 16 volt capacitor?
The tolerance is usually marked on the capacitor (unless it is 20%), so without knowing the markings on the actual capacitor I can give no answer.
The capacitance and working voltage ratings tell nothing about tolerance and they are all you give.
We can take a guess, knowing that a capacitor with those ratings is almost certainly a small electrolytic component. The actual working capacitance of one of those mass produced, low price components can vary by 2 to 1 relative to the marked value. In other words, its tolerance can be +100% and -50%.
What are the types of SMD Capacitor and Inductor?
capacitr use khte jo apne mea electric curent stor kar k rakhta usmea doo palet lage hotea hai jiske bech kuchalk padhrath jesa daielectric khte hai
Why is emf generated when magnetic flux is cut by a conductor?
See related links below. There is a lot of technical jargon there but look at the motor and transformer section.
Derive the bandwidth expression of frequency modulation wave?
A resistor&capacitor are in series with a variable inductor.When the circuit is connected to 200v,50Hz supply,the maximum current obtained by varying the inductance is 0.314A.The voltage across capacitor,when the current in circuit is maximum is 800v.Choose the values of series circuit elements?
What is the role of community mobilizer?
The Role of the Mobilizer:The role of the mobilizer is to mobilize a community to action leading to increased empowerment and self reliance.
Specifically, that entails the following:
- To call community meetings so as to:
- brief all members on correct information related to community self reliance; and
- organize and arrange the provision of all resources (human and materiel) needed for community actions;
- To stimulate community members to participate in their own community's desired development actions;
- To engage in activities that will promote increased community effectiveness, capacity, self reliance, and empowerment;
- To ensure that all information is accurate and correctly interpreted;
- To actively counteract incorrect information, especially that which causes unrealistic expectations, and later disappointment and discouragement;
- To encourage and praise community members, confirming that they have the ability to develop themselves;
- To ensure that every decision about what activities the community will undertake, is the choice of the whole community, not just a few (powerful) community leaders;
- To ensure that the vulnerable are heard in community decisions: including women, youth, disabled, ethnic minorities, the weak and disenfranchised;
- To promote and encourage unity in the community, unity of purpose, of goal and of action; actively counteracting forces of community disunity prejudice, bigotry, racism, sexism, clanism, patronage, caste, class;
- To come together frequently with other mobilizers to share experiences, mutually solve common problems, and to improve skills of social animation and community management;
- To assist in the learning of community management skills and techniques by community leaders and members.
The community mobilizer is a social animator, and should be knowledgeable about social animation principles and skills, seeking to learn more about how communities can be stimulated to unify, take their own decisions, plan actions, identify and provide their own resources for community action, and to choose appropriate strategies for using internal and external resources to reach common community goals.
What will happen if instead of npn transister pnp is used?
It really depends on the configuration of the circuit. A transistor can be connected in any of at least 3 configurations: common base, common emitter, and common collector. Each of these type of configurations determines where the source of electron flow is connected. After that, the biasing configuration needs to be determined, and this will change depending on whether you are using an NPN or PNP transistor. In the simpler biasing configurations, swapping a NPN for a PNP or vice versa will prevent current from flowing as the collector, base, and/or emitter will be reverse or forward-biased incorrectly. You would then either be blocking currently flow, or possibly causing a short circuit. Again, it depends on the configuration. Generally speaking, it is not a good idea. One potential result is you can damage the transistor or even destroy it or possibly damage other components in the circuit.
direct fm generation is a method of generation of fm signal directly with the help of parameter variation method.
in this method we use some of the devices which converts the variation in voltage to variation in frequency such as varactor diode.
What do you mean by splicing in electronics?
Splicing means joining in optical fibers.a process called splicing takes place to join two fibers.
What allows current to pass in an AC circuit in spite the presence of dielectric in the capacitor?
There are two types of electric current: 'conduction current' and 'displacement current'. Normal current flow, for example, electron flow in a metal conductor, is an example of 'conduction current'.
'Displacement current' takes place within dielectrics, such as the dielectric that separates the plates of a capacitor. When a potential difference is applied across a dielectric, the majority of electrons cannot move as they are tied to their individual atoms. However, the shape of the electron orbits around their nucleii, become distorted or elongated ('polarised'), with their 'negative centre' attracted towards the external positive potential, and their 'positive centre' attracted towrds the external negative potential. Whenever the magnitude of the external potential difference changes, so too does the amount of distortion of the electron orbits. We call this a 'displacement current', and it only occurs when the potential difference applied to the dielectric changes. As a.c. potential difference is continually changing in magnitude and direction, so too does the resulting displacement current.
So, when we apply a.c. voltage to a capacitor, a displacement current takes place within the dielectric, while a conduction current takes place around the external circuit.
Circuit diagram to operate ac machine in forward and reverse direction?
The word you are looking for is Drum Switch. Google it and there are many diagrams.
Define the term input offset current?
On a differential amplifier while there is some voltage offset there is also current offset which is dependent on the value of the F/B resistance the bigger value the more offset.
What does damping do in generators?
In AC synchronous generators (alternator), the rotor should turn continuously and smoothly at its rated speed. When loaded, a synchronous alternator can become unstable, that is while rolling it also begins to rock back and forth slighty (this can easily be seen with a strobe light shining on a black mark placed on the end of the shaft, the mark is stationary as the light flashes and then the mark begins to rock clockwise and counter clockwise). The reason is the load torque pressing against the magnetic field traveling around in the alternator and then bouncing off the magnetic field until it catches up again. Remember when a generator loads up by supplying electric power it also gets harder to turn, so what ever is turning the generator has to push harder. Imagin pushing a wheeled cart with a coil spring. The task could get bouncy or "boingy"as the cart runs ahead then slows down. This phenomenon may disturb the generated current waveform and maybe even cause early bearing failure or damage a steam turbine that is turning a large alternator. To stop or reduce the instability is called dampening or damping. A special damping winding is built in the generator. Sometimes called an Amortisseur winding. Roger nsc@psu.edu
Why phase shift oscillator uses three RC pairs?
The frequency stability of oscillators depend on the rate of change of phase with frequency. RC sections help improve the frequency stability. The net phase shift introduced by the RC feedback network is 180 degrees ,which contains n sections.Thus each RC section introduces 180/n degree phase shift. When 2 RC sections are cascaded due to low phase change rate the frequency stability is low. For 3 sections cascaded the phase change rate is high and hence there is improved frequency stability. However for 4 RC sections there is an excellent phase change rate resulting in the most stable oscillator configuration. But 4 RC sections increases cost and makes circuit bulky. Hence phase shift oscillators make use of 3 RC sections in which each section provides a phase shift of 60 degree. The latter is generally used in high precision applications where cost is not much regarded and only accuracy plays a major role.
a there many value to choose from as long as there is at least 50 m amps of bias flowing to the adjust input. the calculation start with known factors like the regulator out put is 1.25 then the rest is just a matter of mathematics
What is the disadvantageand advantage of Superheterodyne receiver?
can a superheterodyne receiver generated high noise
Why is the intelligence signal not in the AM envelope?
The intelligence signal is in the AM envelope.
In AM modulation, the carrier is amplitude modulated by the signal. This signal appears as the envelope of the carrier. You can demodulate it by following the peaks on each cycle of the carrier. You can either follow the positive peaks or the negative peaks - it does not matter if the original modulation is symmetrical.
That is the tower or building that the radar sits on. Radar systems are usually placed in high places so they have an unobstructed view.
Are temperature coefficients alwaws constant?
A: As an engineer it surely like to drink to that. No the coefficient varies from component to component and even with the environment to boot.
How do you study more in less time?
Good question. Lots of people would like to know that. When you find out, please let me know. A study buddy helps.
Why wireless equipment use 13.8 v?
A: The reason being that is the normal car battery potential when fully charged and to be Mobile means it must have a power source like a car battery
What is the current flow in a 12VDC circuit with two 24 ohm resistors in parallel?
In a parallel circuit, the same (supply) voltage will appear across each branch. So, in your example, 12 V will appear across each of the 24-ohm resistors.
To find the current through each resistor, then, you simply divide the supply voltage by the value of that resistor.
Since the supply current is the sum of the two branch currents, to find the supply current, you simply add together the currents passing through each resistor.
