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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 Singapore's power grid AC or DC?
Singapore's power grid mainly operates on AC (alternating current) like most countries around the world. AC is preferred for long-distance power transmission as it can easily be converted to different voltage levels for distribution.
What is audible range of human being?
For humans it is from 20 Hz to 20000 Hz
Elephant - 16 Hz to 12,000 Hz
Cow - 16 Hz to 40,00 Hz
Cat - 100 Hz to 32000 Hz
Dog - 40 Hz to 46000 Hz
Rabbit - 1000 Hz to 1,00,000 Hz
Bat - 1000 Hz to 1,50,000 Hz
Dolphins - 70 Hz to 1,50,000 Hz
Seal - 900 Hz to 2,00,000 Hz
What is quantity represented by the base unit second?
The base unit second represents time in the International System of Units (SI). It is defined as the duration of 9,192,631,770 cycles of radiation corresponding to the transition between two energy levels of the cesium-133 atom.
When do charges move in an electrical system?
when a external force acts on the system then the bond between the atoms in the system are excited and pass to conduction band now the excited carriers runs along the system this called flow of current
Charges move in an electrical system when it is closed and a power source is connected to it.
What does ac-dc travel charger model CT-886004A go to?
The AC-DC travel charger model CT-886004A is designed to be compatible with a variety of electronic devices that require charging on-the-go, such as smartphones, tablets, or portable gaming devices. It typically comes with multiple connectors and adapters to fit different device models.
How does the graph vary between voltage and current?
If the graph is for Ohmic components e.g resistor or wires
-Constant gradient
-V is proportional to I
The second graph is for Non-Ohmic components
e.g Filament lamps/diodes
-(v is NOT proportional to I)
-Gradient is high at the origin (0,0) and low at the top due to an increase in resistance
Hope this helps!!
I couldn't put the pictures on, but just google a Filament lamp graph and they will come up :)
What will happen if you run a transformer at no load?
Yes, a plugged in transformer uses power with no load on it.
No transformer (or any electrical device, for that matter) is ideal, so there are always losses. There is parasitic capacitance, etc. that leads to power draw, particularly between the laminations. Plus, while the laminations are supposed to be insulated from each other, there is leakage current, and this causes power draw due to the tertiary transformer winding, that is partially shorted, which the laminations represent.
Another Answer
This simple answer is practically none.
The primary winding of a transformer draws a very small current (<5% of rated full-load primary current) when the secondary is open circuited (i.e. when the transformer is not supplying a load). Practically all of this 'no-load primary current' is responsible for the magnetic field set up within the core, and it lags the primary voltage by very nearly 90 electrical degrees, which means that the resulting power is practically entirely reactivepower (expressed in reactive volt amperes), and the amount of true power (expressed in watts) is negligible -for a small transformer, probably unmeasurable. For large power and/or distribution transformers, of course, the amount of true power involved is indeed measurable, and contributes to the overall losses in an utility system.
It's 'true power' (not 'reactive power') which determines the rate at which energy is consumed. I suspect what you are really asking is how much ENERGY (true power multiplied by time) a small unloaded transformer uses, then the answer is negligible to the point of being unmeasurable. So it is safe to say that you can leave your transformer plugged in continuously without adding a measurable amount to your electricity bill.
What happens when a relay is operated beyond its rated voltage or current?
Generally speaking, a relay is an electrically operated switch. As such, there are two sets of ratings associated with a relay. The operating voltage will be specified, and the ratings of the contacts are also set down.
As regards exceeding the operating voltage, this will cause excessive current to flow in the relay when it is energized. If the voltage is not significantly higher than the rating, and if the relay is not operated often or for long, it will function normally, but probably with a shorter life. At some point, excessive operating voltage will cause the coil in the relay to fail.
Operating a relay to energize an electrical circuit with a higher voltage or current than the relay is designed for will shorten the life of the contacts in the relay. Higher voltage and current will quickly burn the contacts and destroy them. This is particularly true if that voltage or current is significantly higher than the ratings set by those who designed and constructed the relay. Things might work for a short time, but not for long.
What component of a motor changes induced AC voltage into a pulsating DC?
its commutator..which converts ac produced by and motor to pulsating dc ...
more the commutator divide more accurate dc..means less pulse in dc
Does an Ohmeter that has an infinite reading indicates an open circuit?
Yes, an infinite reading on an Ohmmeter usually indicates an open circuit. This means that there is a break in the circuit, preventing the flow of current and resulting in the high resistance reading.
What is 2.561 K equals how many ohms?
To convert temperature to resistance, you will need to know the specific material's temperature coefficient of resistance. This coefficient determines how much a material's resistance changes per degree temperature change. Without this information, it is not possible to accurately convert temperature to resistance.
Is oxidized copper in liquid phase considered an electrolyte?
No, oxidized copper in liquid phase is not considered an electrolyte. An electrolyte is a substance that can conduct electricity when dissolved in a liquid. Oxidized copper, while it may contain ions, does not exhibit the same electrical conductivity properties as typical electrolytes.
What is maximum secondary coil voltage?
The maximum secondary coil voltage is determined by the turns ratio between the primary and secondary coils in a transformer and the input voltage applied to the primary coil. It can be calculated using the formula: V_secondary = V_primary * (N_secondary / N_primary), where V is voltage and N is the number of turns in each coil.
Placing a voltmeter into a circuit will raise the circuit resistance?
Usually a volt meter is placed across a component to measure the voltage drop across that component. Doing this places the volt meter resistance in parallel with that component's resistance, which will always lower the total resistance. Since the volt meter resistance is usually very large relative to the resistance of the element being measured, the total resistance does not change significantly.
The formula for total resistance of two parallel elements is: Rtot = (R1*R2)/(R1+R2),
as R1 (the volt meter) >> R2, Rtot ~= (R1*R2) / (R1) = R2
If a volt meter is placed into a circuit instead of around an element of that circuit, it will raise the resistance of the circuit, load the circuit with, and interrupt "normal" operation of the circuit (normal operation = how things would be without the meter in place). More importantly, the volt meter would then be measuring the voltage developped across itself (instead of an element of the circuit), which is not the point of this tool / this would be a misapplication of a volt meter.
What are 4 types of DC voltage?
There is only 1 type of DC voltage, and that is direct current. In order to better answer your question, you need to be more specific.
Is 700 watts more powerful than 14 volts?
It is not possible to answer you question, because volts and watts are not comparable. You question would be like asking, "Is 700 pounds heavier than 14 gallons?"
Watts are a measurement of power. Volts are a measure of electrical potential. Comparing watts to voltage is incorrect.
If your circuit has 14 volts and is drawing 50 amps of current you have a total power of 700 watts.
What is the cheapest way of converting ac to dc voltage?
One of the cheapest ways to convert AC to DC voltage is to use a simple rectifier circuit made with diodes. This circuit allows current to flow in only one direction, effectively converting AC to pulsating DC. However, for smoother DC output, you may need to add a filter capacitor to the circuit.
What are three sources of power for control circuit?
Three sources of power for control circuits are batteries, power supplies, and solar panels. These sources provide the necessary voltage and current to operate control devices and components in a circuit.
What is the symbol of non-polar capacitors?
The symbol for non-polar capacitors is typically represented by two parallel lines, with a straight line drawn through each to indicate that they are not polarized. The absence of a polarity marking distinguishes them from polarized capacitors, which have a clear positive and negative terminal.
Physical fitness refers to a person's ability to perform tasks and activities efficiently without experiencing undue fatigue. It involves various components such as cardiovascular endurance, muscular strength, flexibility, and body composition. Regular exercise and a balanced diet are key factors in achieving and maintaining physical fitness.
If quarks flow just like the electrons can they create electricity?
The quark comes with what is called a fractional charge. From a purely theorhetical standpoint, a flow of quarks could generate a magnetic field about their path of travel, and this might be used to generate electricity. But quarks, because they have a characteristic called color confinement, cannot exist freely in nature. The quark only exists inside a composite particle called a hadron, of which the proton and neutron are examples. Don't look for any "quark flow" like you would electron flow in what we normally consider electricity. It's something that isn't going to happen.
Do you replace the coil from a 6 volt to a 12 volt when converting from 6 volt to a 12 volt system?
Yes, when converting from a 6-volt system to a 12-volt system in a vehicle, you typically need to replace the coil with one that is compatible with 12 volts. This is because a coil designed for a 6-volt system may not be able to handle the higher voltage and could lead to issues with the ignition system.
Circuit diagram of water bath and its uses?
A water bath circuit typically consists of a heating element (e.g., a heating coil), temperature sensor (e.g., a thermocouple), thermostat, and power source. The water bath is used in laboratories to provide a consistent temperature environment for experiments requiring gentle heating or cooling, such as incubation, crystallization, and maintaining samples at a specific temperature for extended periods.
What is the frequency range of guided rocket?
Guided rockets typically operate within the radio frequency range, around 2-18 GHz. This range allows for effective communication between the rocket and the guidance system, enabling accurate control and targeting of the rocket during flight.
Is copper has low resistivity or low resistance?
Copper is a material - although you can make objects from it.
Resistivity is a property of materials.
Resistance is a property of objects - it depends on the resistivity of the material the object is made of, the shape and size of the object, and also of where you connect to take your measurement.
With all this in mind:
Copper has a low resistivity.
Copper objects tend to have low resistance compared to other objects of similar shape and size made of materials with a higher resistivity
You can still achieve quite high resistances with a long enough piece of very thin copper wire.
