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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 if you left your charger on the outlet with out charging your phone what will happen?
at this point nothing has happened... you basically have extended the circuit... except it is still an open circuit... until the circuit is closed electricity doesnt move... the moment you close the circle or circuit(like by attaching your phone) then the electricity can flow... electricity needs a complete path(like a circle) to work
Why there is two voltage rating on the same cable like 300V or 500V?
The first figure indicates the phase to neutral or ground voltage and the second is the phase to phase voltage. i.e. Vph-ph = 1.732Vph-n
How can one optimize their bandwidth?
There are multiple ways to optimize bandwidth. While working in your browser window, be sure to try to keep one browser window open at a time. This increases the stream. Use an optimizer performance checker online to see how the computer is ranging in bandwidth. See what is running on your computer in your start up properties and stop running what is not needed. A shortcut to shutting down unnecessary running programs on your computer. Start menu, type in the search box, "msconfig". Depending on your operating system, a display for an msconfig window will appear. Just check all that apply. If your computer does nothing, believe it or not, you already did it. Now restart your computer.
What is amplitude modulation derive expression for am wave and modulation index?
the maximum amplitude of carrier wave varied with respect to instantaneous values of message signal is called amplitude modulation
A sensor that is activated by a lack of light (the dark). Usually these can be found in night lights that turn on when the lights are turned out.
What is delay in digital system design?
Delay is mechanism allowing introducing timing parameters to specified system.
Delays are specified in signal assignment statements. It is not allowed to specify delays in variable assignments.
Syntax:
delay_mechanism ::= transport | [ rejecttime_expression ] inertial
Types :
There are two types of delays in VHDL:
1.Inertial delay:
Inertial delay is defined using the reserved word inertial and is used to model the devices, which are inherently inertial. In practice this means, that impulses shorter than specified switching time are not transmitted.
Inertial delay specification may contain a reject clause. This clause can be used to specify the minimum impulse width that will be propagated, regardless of the switching time specified (Example 3).
If the delay mechanism is not specified then by default it is inertial.
2.Transport delay:
The transport delay is defined using the reserved word transport and is characteristic for transmission lines. New signal value is assigned with specified delay independently from the width of the impulse in waveform.
Since inductive reactance is 90° out of phase from pure resistance, this can be calculated like the hypotenuse of a right triangle. Sqrt( 172 + 62) = 18.028 Ω
The angle is 70.6° lagging.
What are the various potentials used in antenna theory?
scaler electric potential
vector magnetic potentials
retarded potentials
Explain how Zener Diode is used as a voltage regulator?
A zener is a diode that has the property when reversed bias to breakdown at a specific voltage this voltage will remain constant as current increase. It is important to be aware that the diode will need to dissipate heat while it is operating. The power is the current flowing through the diode multiplied by the voltage across the diode. For zener diodes with a high reverse breakdown voltage, it can be seen that a lot of power may need to be dissipated for a relatively low current.
We can use the constant voltage as a reference voltage. Either a component can be powered directly from the reference voltage created or additional components can be used to increase the available current.
How do you find secondary voltage with a ratio of 1 to 200?
If the primary is 1 and the secondary 200 then multiply the primary voltage by 200.
Using ohm's law v=IR but we need to find the Resistance so, in place of v write r R=V/I
Does it matter what order circuits are connected?
Sometimes it matters and sometimes it doesnt, it depends on what kind of product you are talking about and I don't have that information, so its impossible for me to guess whether it needs to be on a certain order or not.
Your mother is a good example, anyone can buy her...
I heard she slept with your mate Sam for a packet of biscuits
What is Wireless transmission system?
A wireless transmission consists of at a minimum: input signal (the data or analog signal you wish to transmit), transmitter, 2 antennas, space (the final frontier) and a receiver/reproducer.
This only makes one way transmission possible. You would need an additional: transmitter, receiver/reproducer and 2 antenna couplers (allows both a transmitter and receiver to use the same antenna) to have 2 way communication.
A basic transmitter consists of a power source, a signal generator (oscillator), signal converter/amplifier, mixer (mixes the oscillator and amp signals to create the transmitted signal), output amplifier.
a receiver is similar to a transmitter except instead of mixing the signal with the oscillator signal it removes the oscillator signal. Systems can be much more complicated depending on power needs (distance between antennas, frequency interference...) and application (encoder/decoder, security or digital conversion).
What happens if a circuit has no resistance?
Then the voltage in will equal the voltage out. The purpose of a resistor is to reduce the amount of electrical flow of current.
You 'short out' the supply and blow a fuse/circuit breaker.
How do you get two bright lights and one dim light without a resistor?
1. Use 3 lightbulbs, with a 3 way switch.
2. Use 1 3-way lightbulb with a 3 way switch.
3. Use a diode in series with one bulb to dim it.
4. Use a silicon-controlled rectifier (SCR) with a simple circuit to cut out a certain percentage of each AC wave.
