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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
How many diodes are used to make a half wave rectifier?
You use a half-wave rectifier where the system design does not require a full-wave approach.
Half wave rectifier output is used for running ac motors.
Can a transformer work using dc?
no. because if we use dc source for transformer there will be no production of energy for the secondary side since they are mutually conducted, as the transformer is a static device which can transmite the energy from one circuit to other with out changing the frequency and also there is no movement of the conductors. in order to produce the emf there should be either conductor movement or moving flux so the dc source will produce constant field flux hence there is no production of energy in the secondary side.
What is difference between resistance and reactance while both are measured in ohms?
Resistance is constant no matter the frequency applied. Reactance varies depending on the frequency of the power applied to it.
How does a diode change from AC to DC?
it clips all the bottom voltage off the sine wave,to get steady dc voltage you will need to clean up the ripple to get good voltage regulation
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A diode does not change AC to DC, but it does allow alternating current to flow in only one direction. A diode (or often 2 or 4 diodes) with a filter can be used to rectify AC into DC.
The 7809 IC is a three-terminal nine volt linear regulator IC. You provide 11 or more volts on two terminals, and the IC provides a regulated 9 volts on two terminals, one of which is common, i.e. ground. It is useful in simple circuits, where only a few amperes is required, though it can be boosted using power transistors. For higher current applications, however, a switching regulator design is better.
Why wouldn't you want the circuits in your home to be series circuits?
In series, each device creates a voltage drop related to the current and impedence of the device, therefore, the voltage for the devices in the circuit are not the same.
Addition:
Also, in a series circuit, if one device fails, all others in the circuit would also "turn off" - think older strands of Christmas lights.
Lets say for example that all the lights in your house were in a series circuit. When you turned the circuit on, all the lights would come on, but when you turn the switch off, all the lights would also go off (possibly useful when leaving for the day or going to bed). Now, one light bulb blows out...every light in the house would go out, leaving you to try replacing every light in the house until you found the correct one...in the dark.
What are the differences between analog and digital transistors?
transducer convert one energy to other energy .now in analog transducer it convert energy use of analog signal and digital it converts use og digital signal
Which can transmit faster optical fiber or copper wire?
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What atomic particle that has a positive and negative changes?
maybe a neutron
when Millikan messed with oil drops he kinda thought the steps he saw were unit charges.. now we are getting strange and quarkey and consider an electron to be 2/3 of a unit charge made up of smaller units witch are real unit charges
but with the infinite knowledge of the senate and congress the super collider was killed so we may never know.
A: Any VOHM can check a transistor but only as good or bad .It will never tell you how good or how bad. A TEKTRONIC curve tracer does a very decent job for these devices.
a diode current rectifier is a device that uses 4 diodes arranged in such a way that it converts alternating current into direct current
the arrangement is called a bridge rectifier
it is very simple in how it works but the best way to understand how it works would be to see a diagram of a bridge rectifier with the current directions marked out on it
When the input connected to the left corner is negative, and the input connected to the right corner is positive, current flows from the lower supply terminal to the right along the red (positive) path to the output, and returns to the upper supply terminal via the blue (negative) path.diode-bridge
How do you work out ampere hour?
An ampere-hour is one ampere for one hour.
A ampere is one coulomb per second, so an ampere-hour is a transfer of charge of 3600 coulombs.
See the discussion page.
A thyristor is a part of a alarm circuit you use it so the alarm stays on
A microchip is an electronic device built as a single unit from many miniature components mainly transistors.Microchips are made by building up electronic circuits in a tiny wafer or pure silicon in a complicated layer-by-layer process.
Will semiconductors amplify the electric signal in a transistor?
Actually, a transistor is a device made from semiconductor material, and they're used to amplify and switch electronic signals as well as electrical power. Before transistors were invented, product engineers had to use vacuum tubes and electromechanical switches in order to complete electric circuits.
Can you change a 50 microfarad capacitor rated at 370 volts with one rated at 440 volts?
Field replacement of a capacitor when you don't have the correct size available.
It is an acceptable temporary fix to go up one rating size (for example, from a 5 microfarad original up to a 7.5 microfarad replacement) so long as the voltage of the replacement capacitor is equal to or greater than the original and the current draw under load does not exceed the appliance's current rating as stated on its rating plate.
It is important to stress that a capacitor of the correct size should be installed as soon as possible because a larger capacitor will allow a higher current to flow. (Larger meaning not the outside dimensions physically but the capacity in microfarads.) Assuming the supply voltage, supply frequency and everything else in the circuit stays the same, it is safest to assume that the current will increase directly in proportion to the increase in the microfarad capacity. So adding 50% more microfarads would result in 50% more current. If there is a transformer or a motor in the circuit the extra current could damage its windings or even cause a fire!
So be careful! IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB
SAFELY AND COMPETENTLY
REFER THIS WORK TO QUALIFIED PROFESSIONALS.
If you do this work yourself, always turn off the power
at the breaker box/fuse panel BEFORE you attempt to do any work AND
always use an electrician's test meter having metal-tipped probes
(not a simple proximity voltage indicator)
to insure the circuit is, in fact, de-energized.
No freaking way but it would make an excellent low level switch if forced at beta of 10
What are the uses of oscillators in electronics?
to produce sustained oscillations without any ac input.it is nothing but an amplifier with positive feedback and without input.it just converts the noise in the circuit and amplifies it to produce oscillations.
What voltage would you expect across a 1 ohms load?
Since, by Ohm's law, Voltage is amperes times ohms, the voltage one would expect across a 1 ohm load would be 1 volt per ampere.
How to draw NOT gate using NPN transistor?
RTL logic: NPN transistor. Emitter grounded. Input connected to base through a resistor. Vcc also connected to base through a resistor. If the input is high or open, the transistor is on. If the input is low, the transistor is off. Connect a resistor from Vcc to the collector. The collector is the ouput. You have to play around with resistor values to setup your fan-in and fan-out properties.
