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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
Is tv parallel or series circuit?
The outlets in your house are in parallel with each other. If your question is is your TV in series with something else plugged into your house, it is not, it is in parallel (since your house wiring is in parallel).
The giveaway for series or parallel circuits is if you remove one element in a series circuit, you will kill all other elements. In a parallel circuit, there shouldn't be a noticeable difference.
For example, if you have a surge protector plugged into your wall, and a lamp plugged into your wall, and your TV and DVD player are plugged into the surge protector:
The surge protector is in SERIES with your TV and DVD player
The surge protector is in PARALLEL with your lamp
The DVD player and TV are in PARALLEL
Distinguish between op amp and differential amplifier?
Look up "op amp" on wikipedia, there is a good drawing near the bottom right. An op amp contains a differential amplifier as the first stage, but has multiple following stages that provide amplifier near ideal characteristics of high input resistance and low output resistance (it can drive more current than a single dif amplifier stage).
What is the Meaning of turn down ratio on a pressure transmitter?
This is a number that indicates what range the transmitter will work correctly. This will depend on how strong the transmitter is.
What is the definition of optical and electrical bandgap?
Optical bandgap means bandgap estimated using optical means or characterization. In simple words, let a light of different energies incident on the material. The material absorbs some energies and transmits some energies (the detector measures this). The threshold energy at which the material starts absorbing light is "Optical Bandgap".
In a similar manner, electrical bandgap means bandgap estimated using electrical means or characterization. Here instead of measuring what light is observed of transmitted. You make electrical contacts for the material and measure the current instead of optical absorption. The incident light is of course absorbed, and carriers (electrons and holes) are generated in proportion to absorption. We measure current (nothing but charge which is proportional to absorption) and this current too shoots up at a threshold energy i.e. electrical bandgap.
How many milli ohms in 0.15 ohms?
Since "milli" means "thousandth", there are 150 milliohms in 0.15 ohms.
Disadvantages of 3 phase induction motor?
One of the disadvantages of the 3 phase induction motor is that it requires a three wire supply. The other disadvantage is that the 3 phase induction motors have poor starting torque and high have in the rush currents.
In one sense, using any resistor will "waste" energy. But consider that resistors serve a useful purpose, and the heat they generate is the price we pay for using them. Additionally, there are resistors that we use specifically to create heat for our use. The resistance in an electrical heating element on a range, in a hot water heater, or in a space heater are creating useful heat. We need the heat to cook food, heat water or warm a room. We generally make toast with resistance heating elements, to cite another application.
In electronic equipments, resistors are used to "drop voltage" to make circuits work. We create heat when we use resistors to drop voltage, but it is a necessary part of circuit design and operation. In that light, we allow heat loss in order to gain the things the electronics do for us. When we watch TV or listen to music, we know that the electronic circuits in our equipment have some resistance that is generating heat. But that is part of the price we pay for having the use and benefit of the electronic equipment.
I = E/R = 10/20 = 0.5 Ampere
Transformer used in digital alarm clock?
-it is easy to get and aconinient to use
-produce direct current (d.c
The only device that develops true power in an electronic circuit is the inductor?
The resistor is the only component to develop true power in an ac circuit. The inductor and capacitors absorb energy on one half cycle and return it to the supply on the next. The resistive part of the inductor (wire coil if low frequency type) will develop true power due to its value of resistance ie it will get warm.
Which wire ensures that electricity will flow through it when flowing downhill instead of in people?
Seems to be a joke question...
Of course properly and well dimensioned insulatedwires
when wind is channeled into a narrow area increasing wind speed. for example between buildings
a. the current and voltage in phase
What is one source of constant electric current?
Cells and batteries.
A more detailed answer
In general, most power supply sources - including cells and batteries - cannot supply either a truly constant current or voltage.
Because most load devices are designed to require a nearly constant voltage - and not a specific constant current. - most power supplies - including cells and batteries - are designed to supply a given output voltage whatever the current that is being drawn, provided of course that the current stays within a pre-determined designed range of output current values.
One definition of "constant current source" is that it has zero output resistance, which in practice cannot exist.
However, a transistor can act as a constant current source if biased and used in that manner. This can also be done using one of the several standard "voltage regulator" components - which are available from electronics parts suppliers - because they can be hooked-up to act as constant current sources to operate over a small range.
Why star delta timer required for motor?
The timer is used to give the motor time to reach its running speed at the star voltage. Once the timer times out the star contactor drops out and the delta contactor pulls in.
Does the connection between your home and the end office local loop use an analog or digital signal?
It depends. It's true, the standard POTS (plain old telephone service) is delivered over an analog loop. However, you may have a service known as DSL, it is even in the name (Digital Subscriber Line) digital. It uses the *unheard* areas (25kHz+) of the line to carry digital signal. So a line can be both analog and digital! Also, DSL can be provided on what's called a "dry loop" which is using a pair of copper (typically what would carry POTS service, but isn't connected to the PSTN.) That being said, it can be Analog, Digital or both: Analog and Digital.
What is the voltage used in Uganda?
It is 240V / 50Hz AC. The plug/socket used is like the one used in Great Britain.
Can every function be expanded in fouriers series?
no every function cannot be expressed in fourier series... fourier series can b usd only for periodic functions.
There is a company called Maxis who have brought programs like SimCity to the wider games world. The only other thing that fits the Maxi Computer description is a supercomputer on the US Defence Department could afford.
Advantages and disadvantages of Permanent magnetic moving coil?
1,it has uniform scale
2,with a power ful magnet its torqe to weight ratio is very high so operating current is small
3,the sensitivity is high
Increasing the current flowing through this device makes it stronger?
no it does not make stronger.... if the device does not have that capability to with stand tat current...... the device will be destroyed........
The distance in a straight line from one place on a ripple to the same place on the next ripple is called the wave length.
