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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
Why different electrical devices have different fuses and how the fuses are different?
The current flowing through a cable supplying a load or loads depends on the combined power of those loads, and the size of the cable is chosen according to the anticipated load. If the cable is overloaded, then it will draw excessive current (an 'overload current') and overheat, and its insulation may eventually fail, and present a fire hazard. If one or other of the load devices develops a fault, then that device may draw significantly more current (a 'short-circuit current') than it should and it will fail. So, cables are subject to over currents -i.e. 'overload currents' or 'short-circuit currents'.
A fuse is an over current protective device. It is designed to disconnect the cable supplying a load or loads in the event of an overload or short-circuit current occurring either in the cable or in the loads. By doing so, it protects the cable as well as the load, from overheating and prevents the possibility of a fire.
All fuses work on the same principle. A fuse carriercontains a fuse link, or fuse element, which is connected in series with the cable and its load. When an overload current occurs, the fuse link melts, and creates a break in the circuit, disconnecting the cable. The fuse link is carefully manufactured so that the larger the over current, the faster it melts.
Fuses are rated in amperes, according to the maximum current they can continuously carry without melting, and are manufactured in a range of standard current ratings. What makes each fuse rating different is the cross-sectional area of their fuse link; the greater the cross-sectional area, the higher the current rating.
In your home, individual circuits are each protected by a fuse*, sized according to the current capacity of the individual circuit. These, in turn are protected by a larger fuse which protects all the circuits. The larger fuse is designed to operate only if one of the individual circuit fuses fails to operate quickly enough. By fusing individual circuits in this way, an over current should only affect an individual circuit, without affecting any of the healthy circuits.
There are a great many different types and design of fuse, according to their application and the magnitude of system voltage they are to operate. Fuses designed to operate on low voltage systems are physically quite small, whereas fuses designed to operate of high-voltage systems are physically quite large -but they all work on the same principle.
*In residences, fuses are now being replaced by miniature circuit breakers (MCBs), which can be reset after they have operated, unlike fuses which must be replaced.
What device opens and closes an electric circuit?
A switch is a device that is used to open and close an electrical circuit that is is connected into.
What figurative language is ripple?
Ripple refers to an AC component riding on an DC rail but it can refers to others circuit as well.
Why does a digital multimeter show rms voltage?
rms values refer to "root mean square" mathematical values of the sine wave of electricity. This is essentially an "average" value of the voltage being measured as voltage in any circuit varies constantly.
What is the current value of a 1998 Honda Accord EX?
Depends on where you live and the condition of the vehicle. Go to www.nada.com for the current value of your car. I say "priceless."
tps will be located other side ofthrotle to accel cable check for clean connection at tps plug replace tps unless you can test unit dave.cop
Effect of decoupling capacitances on dynamic IR drop?
Well , infact i was searching for some docs on SI , and I came across this question. I think I can give you a brief idea about your query Decoupling means to disconnect- Decaps are used to decouple one part of electrical n/w from other. noise caused by other elements are bypassed to ground by this capacitor and thus it nullify the effect. Dynamic IR is all abt the Ldi/dt effect of the wires. The capacitor will try to cancel the inductive impedance
Transformer Z-ratio = (Zpri / Zsec) = (Vpri / Vsec)2 It could also be the damping factor DF = Zload / Zsource The damping factor DF is the load impedance Zload (input impedance) divided by the the source impedance Zsource (output impedance).
What is effect of Electro magnetic field on human health?
This is always being studied. For frequencies below microwaves there appear to be virtually zero effects.
What is a dry-type transformer?
Electric company high voltage transformers used in the utility grid are typically insulated by being immersed in a tank of oil, and cooled by natural convection (circulation) of the oil. A "dry type" transformer is not immersed in oil, and is cooled by air convection or by fans.
What determines the speed of an AC motor?
The higher the frequency the higher the RPM the motor will turn
What is a cross coupled transistor?
A cross coupled transistor pair are used to increase the gain of the cell.
Capacitors in series plus 4uf plus 6uf?
Capacitors in series: (1/Total) = 1/A + 1/B 1/Total = (B + A) / AB Total = AB/(A+B) = (Product)/(Sum), if only twocapacitors in series. We have 4uf and 6 uf. Product = (4 x 6) x 10-12 = 2.4 x 10-11 Sum = (4 + 6) x 10-6 = 1 x 10-5 Product/sum = (2.4 x 10-11) / (1 x 10-5) = 2.4 x 10-6 = 2.4 uf ======================================== Easier:Total = product/sum = (4 x 6) / (4 + 6) = 24/10 = 2.4 uf
What is non coherent detection?
Non-coherent detection uses a product detector with a beat frequency oscillator to detect Morse code, CW transmissions or single-side band. It does not need carrier phase information at the receiver.
What is beta current multiplier?
A; Is not a current multiplier it is merely an empirical number assign to a part to indicate its capability at a certain current. The value can vary from 10 to 200 for the same transistor depends on the current that is is suppose to carry.
How can we Diode can be used as a rectifier?
A diode is used to stop the negative voltage swing in an AC signal, so you only get the positive portions.
Why RC oscillators are not suitable for high frequency generation?
Because an RC oscillator is affected by stray capacitance in the active components in the circuit. HF oscillators use an LC tuned circuit to define the frequency.
What is example of dependent source and independent source of voltage and current?
Boss its a circuit not a device, you can also create one of yours..... just use simple logic of voltage divider and current divider rules...
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Many television stations have been using digital signals for at least 30 years. They turned them into analog signals at the antenna for broadcast. Now they are simply leaving them in their original form.
How is a voltmeter connected in the circuit to measure the potential difference between two points?
The voltmeter is connected in parallel between the two points whose potential difference is required.
The principle is "legitimacy" -- along with restraint and perseverance, it is one of 3 modern principles of warfare.
How would you make a bulb in a circuit shine fainter light suggest 2 ways to do this?
lower the voltage by using a different power source or by placeing a variable resistor in series with the light bulb.
