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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 a maximum voltage across a resistor?
The voltage across the resistor is whatever voltage is applied. The only maximum here would be a voltage that would damage the resistor. If you think this might happen, you'll have to look up such a voltage from the data sheets.
What are the advantages of BPSK?
Binary Phase Shift Keying (BPSK) offers several advantages, including its simplicity and robustness against noise, making it suitable for low-bandwidth applications. It has a relatively low probability of error, especially in environments with high interference. Additionally, BPSK is efficient in terms of power consumption, which is beneficial for battery-operated devices. Its straightforward implementation also facilitates easier modulation and demodulation processes.
Why sine wave is represent in analog signal?
An analog signal is simply a quantity varying continuously over time..But because
we are interested in information and communication, we are usually interested in
rapidly varying signals that have some underlying periodicity. Therefore we use sin wave
How does a germanium diode look like?
Germanium diodes can be point contact, grown junction, alloy junction, diffused junction, or surface barrier; each type is made differently.
- point contact, a sharp pointed metal wire is pressed against the surface of a piece of germanium
- grown junction, as a boul of germanium is being pulled a quantity of the opposite dopant is added to the molten germanium, the boul is then sliced on opposite sides of the junction and diced into individual diodes
- alloy junction, a pellet of alloy containing the opposite dopant is placed on a piece of germanium and heated until it alloys into the surface of the germanium
- diffused junction, dopant of the opposite type of a piece of germanium is applied and heated to allow it to diffuse into the germanium
- surface barrier, a piece of germanium is carefully cleaned then metal is electroplated on a small spot on its surface
Note: all of these methods have also been used to make germanium transistors.
What is kirchhoff's loop theorem?
a closed path in a circuit in which no circuit element or node is encountered more than once.
How do you focus magnetic flux?
Just a hypothesis: Cylindrical shape with cone shape combined in special array. Made of electric coils and permanent magnets.
How do you find average back emf?
Normally emf can be calculated by the following formula
e=N*(dф/dt) where dф/dt = rate of change of flux linkages
In actual practice it is given as e=-[N*(dф/dt) ] because as per lenzs law the voltage induced in a direction to oppose the very cause for it i.e., change in flux linkages.
vydehi
Is there uranium in X-ray machines?
No, X rays are EM radiation and are produced by electrical/electronic equipment
Why Reduction in Depletion region width with increase in doping?
Because Reverse bias constrained the majority carries to repel from both side (P side & N side)hence Depletion layer is formed with a large extant of majority carriers hence the depletion region is wider in reverse bias.
What is the difference between Alternators and generators?
Generators produce electricity as direct current and Alternators produce electricity as alternating current. As alternators produce electricity more effeciently, and they are smaller and lighter and are used in modern vehicles.
A generator creates direct current in the manufacture of power. An Alternator creates alternating current in the creation of power. Alternators can have diodes installed internally so that they have a D.C. output.
Disadvantage of optical fiber communication?
•Only economical when the bandwidth is fully utilised
•High cost of installation
•A lot of hardware at the moment is not compatible with fibre optic cables, they need to be adapted in order to make use of them
Becasue they are the lowest level state courts in the state judicial system - courts of "original jurisdiction' which hear cases within their assigned judicial "circuit."
What are the different ways of constructing a multiway if-else structure?
If this is a one-off, use either SSI components from your junk-box, or one or more MUX chips, with some outputs wired back to inputs.
If you are making quantities, either use an eprom, burn it to ROM when it's debugged, or use a PLA.
Whichever you do, logical analysis first will probably save time and money in the long term.
What are the charactristic of embedded system?
An embedded system has historically been defined as a single function product where the intelligence is embedded in the system. It could be anything from a dishwasher to a hearing aid, if that product includes a microprocessor and software. Many of today's embedded systems are looking more like PCs with user interfaces, touchscreens, displays, keypads and more. Still, these are not general function systems but are designed to perform very specific functions.
Is there any visible difference between thyristor and transistor?
A diode is a solid state passive device that will only allow current to flow in one and only one direction (Anode->Cathode). A Thyristor behaves exactly like a Diode except that in order for current to flow it must "see" current at its gate, if it does not see current (ie logic 0 or ground) then current is not allowed to flow from its anode to cathode.
Note: The Thyristor gate requires little current to trigger its gate, meaning a small amount of current can be used to switch on/off a load require much more current.
Another Note: Since the Thyristor has a gate which controls its output it is not a passive device like the diode
the energy is stored in the magnetic field surrounding the inductor, which takes time to build up and time to collapse. when current is first applied, the absence of magnetic field opposes it until the field has built up. when current is removed, the built up magnetic field opposes it forcing current to flow until the field has collapsed.
nothing happens instantly when dealing with fields, either magnetic or electrostatic.
What is long form of JK flip flop?
the J & K are just arbitrarily chosen letters and therefor have no "long form".
What are the functions of pnp?
In what sense? In transistor jargon, p stands for positively doped type and n for negatively doped semiconductor. Another terminology used in mobile games is Pass 'n play.
Difference between mealy and Moore sequencial circuits?
in the Moore finite state machine model output depends only on the present state.
but in the mealy model the output depends on the both present state and the input.
this is the main difference
What is the power consumption of a capacitor or inductor?
Capacitors and Inductors theoretically consume no power. In real life, they only consume power because they have an internal resistance.
In physics, power is the rate at which energy is transferred, used, or transformed. The unit of power is the joule per second (J/s), known as the watt (in honor of James Watt, the eighteenth-century developer of the steam engine). For example, the rate at which a light bulb transforms electrical energy into heat and light is measured in watts-the more wattage, the more power, or equivalently the more electrical energy is used per unit time.
