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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 working principle of ATM?
The working principle of the ATM is to offer cash access virtually anywhere. An compatible card is input, a PIN code entered, account balance checked, and money dispensed.
How much power does a 300 VA UPS consume?
From the description given its output power would be 300 Volt-Amps which is almost the same as 300 Watts but may not be, depending on the power factor.
If we allow, say, 10% extra for power losses, the UPS (Un-interruptable Power Supply to those who don't know what such things are) may consume about 330 Watts from your building's main electrical power supply.
If you need to have a more accurate idea of the power it takes why not look at the rating plate on the UPS unit itself? Or if you had a Wattmeter you could measure the maximum power drawn when it is working at full load charging its batteries.
Voltage gain is the ratio of the output voltage of an amplifier to its input voltage.
Since they are in series you can use R=R1+R2+R3... for Total Resistance, then use Ohms Law of I=V/R and solve for I and R. (remember that V and I are also Totals, unless you brake them down at each point)
Applications of wien bridge oscillator?
A Wein Bridge Oscillator is a oscillator which is used for the measurement of Audio Frequency.
On what factors capacitance of a capacitor depends on?
The job of a capacitor is to store charge onto its plates. The amount of electrical charge that a capacitor can store on its plates is known as its Capacitance value and depends upon three main factors.
- The surface area, A of the two conductive plates which make up the capacitor, the larger the area the greater the capacitance.
- The distance, d between the two plates, the smaller the distance the greater the capacitance.
- The type of material which separates the two plates called the "dielectric", the higher the permittivity of the dielectric the greater the capacitance.
- Bit justification is needed in PDH - No would standards available at optical interface in PDH - line rates are not standard - Interfacing problem at multivendor equipment - PDH supports 16E1s and SDH supports 63E1s
A stimulant containing dextro-amphetamines to treat ADHD or narcolepsy.
Please tell the website where you get bst information about satellite and satellite communiction?
Google!
Fullwave center-tap rectifier theory?
The Center-Tapped Full-Wave Rectifier
A center-tapped rectifier is a type of full-wave rectifier that uses two diodes connected to the secondary of a center-tapped transformer, as shown in Figure (a). The input voltage is coupled through the transformer to the center-tapped secondary. Half of the total secondary voltage appears between the center tap and each end of the secondary winding as shown.
Read more: http://www.daenotes.com/electronics/devices-circuits/center-tapped-full-wave-rectifier#ixzz2IVoFQ5erFor a positive half-cycle of the input voltage, the polarities of the secondary voltages are as shown in Figure (a). This condition forward-biases diode D1 and reverse-biases diode D2. The current path is through D1 and the load resistor RL, as indicated. For a negative half-cycle of the input voltage, the voltage polarities on the secondary are as shown in Figure (b). This condition reverse-biases D1 and forward-biases D2. The current path is through D2 and RL, as indicated. Because the output current during both the positive and negative portions of the input cycle is in the same direction through the load, the output voltage developed across the load resistor is a full-wave rectified dc voltage, as shown.
Read more: http://www.daenotes.com/electronics/devices-circuits/center-tapped-full-wave-rectifier#ixzz2IVoev4Vf
Is it necessary to have agirlfriend?
It's not really necessary to have a girl friend,but it teaches you how to maintain your relationship later in life.
Does a resistor only decrease current in a circuit?
A resistor does not only decrease current in a circuit it can also reduce tension(voltage) if connected in series.
it is a capacitor created with a cmos transistor where the source, body and gate are tied together to ground and the drain is tied to the source voltage.
Why are all cores exposed to ac flux variation laminated?
Limit effects (heat loss) caused by eddy currents
What is circular complex Additive White Gaussian Noise?
"Circular" means the variance of the real and imaginary parts are equal.
"White" refers to the fact that the power spectral density of the noise is flat across the whole frequency spectrum. This means that its autocorrelation is a Dirac-delta at t=0 (so its covariance matrix will show noise powers on the diagonal elements and zeros elsewhere).
"Gaussian" means the probability distribution of the amplitudes of the noise samples is Gaussian.
What is horizontal deflection system in CRO?
in a CRO ,fast moving electrons coming from cathode tube strikes the screen .This is seen as a single dot,but for viewing a waveform it is required that the electrons should move both horizontally as well as vertically. For that purpose a horizontal deflection plate is provided in the cro. This deflection plate is supplied with voltages , so that the electrons passing through these plates get deflected horizontally.due to alternating voltages these electrons deflect right & left very quickly, that we humans fell it is a straight horizontal line due our perception. THE voltages is provided by sweep generator,which produce ramp voltages WHICH IS AMPLIFIED & PROVIDED TO HORIZONTAL DEFLECTION PLATES in a CRO ,fast moving electrons coming from cathode tube strikes the screen .This is seen as a single dot,but for viewing a waveform it is required that the electrons should move both horizontally as well as vertically. For that purpose a horizontal deflection plate is provided in the cro. This deflection plate is supplied with voltages , so that the electrons passing through these plates get deflected horizontally.due to alternating voltages these electrons deflect right & left very quickly, that we humans fell it is a straight horizontal line due our perception. THE voltages is provided by sweep generator,which produce ramp voltages WHICH IS AMPLIFIED & PROVIDED TO HORIZONTAL DEFLECTION PLATES
What are advantages of electronic wattmeter?
The advantages of wattmeter include adequate for low frequencies, easy to operate and better technology. There are different types of wattmeter and each has specific advantages.
Why transmit power for UHF equipment is less than that of VHF equipment?
Well VHF is more for long distance and has a longer wavelength. So, it would logically require more power. UHF is more line of sight and has good in building penetration and doesnt require the transmit power that VHF would require.
How are capacitors used in speaker applications?
Capacitors are used to limit the frequencies sent to speaker units in multiple speaker applications.
As the frequency increases, so does the effective resistance of the capaitor. (known as reactance)
For instance, tweeters only work efficiently with high frequencies. Applying low frequencies to these devices is inefficient and could cause harm to the unit. Putting a capaitor in line with it will only allow high frequencies through. Using a combination of capacitors and coils, in parrallel to form filters, can make only desired frequencies pass to the correct driver unit. Each speaker can then work most effeciently with the desired frequency. This is a fine art, to make sure that the sound is pure and not coloured or distorted and has to also match the cabinet in which the drivers are mounted.
