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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 the period of a signal with a frequency of KHz?
1Hz is unit of frequency,which is equals to one cycle per second........................
....................................................................................................shashi
What is conduction angle in thyristor?
not a clue
a
A: It all depends on the thyristor. There are no calculation involved not until you look up the thyristor specifications and decide on the load of the thyristor then you may calculate or more likely choose.
Does a current carrying conductor experience a force when kept parallel to the magnetic field?
Yes. The force attracts the conductor to the magnetic field,
F= eVB = e(-V.B + VxB) = e[-V.B, ] =- eV.B when V and B are parallel!
How calculate the leakage of the capacitor?
leakage current can be determine through the use of clampmeter or ohm-meter. leakage current can be determine through the use of clampmeter or ohm-meter.
You can use Ohm's law (E=IR) to get this answer. Disconnect power to the circuit, and measure the leakage path's resistance (This is usually the rated resistance of the insulating material...you will need a M-ohmmeter to measure insulation resistance, as it will be MUCH higher than a standard ohmmeter can measure). Then rework the formula to solve for current: I=E/R or simply: divide voltage by resistance. You can also use an inductive current clamp as mentioned above. This clamp measures electrical current by measuring the electromagnetic field strength of the current flowing through the wire.
vibration sensor are many type but i am sharing with you only accelerometer vibration sensor meter
Working principle: measure the rate at which the velocity of an the object is changing
Note: acceleration can,t measure directly and accelerometer measure the force exerted by restraints that are the fixed spot or place
Newton @and law apply here: mass* acceleration
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Is a television a series circuit?
A television set is a complex group of circuits where we find components in series and others that are in parallel.
Application of full wave rectifier?
Transformer is used to step down the voltage. Your normal supply voltage is 230V but diodes used in rectifier can't handle that huge voltage hence this voltage needs to be reduced. This is done by transformer. Transformer brings down 230V voltage to say 10V. If you are talking about step down transformer than you should know that step down transformer produces equal voltages although opposite in polarity but equal in magnitude(ie +V and -V) across both diodes. If you don't use it the voltage across one diode may be greater than voltage across other diode. Say non-center tapped transformer produces 10V across diode D1 & -8V across diode D2. In next half cycle, -10V will be produced across d1 & +8V across D2. So in first half cycle current due to forward biased diode D1(as voltage across it is greater) will be greater than the current produced due to diode D2 in next half cycle. So rectified current waveform won't be equal.
The transformer is for isolation so the full wave rectifier can float free of the line hot & neutral wires. The power supply can then define its own ground node without "fighting" the line, this is also much safer for the user. Step-up, Step-down, or one-to-one transformer types are irrelevant to full wave rectifier but are selected by the needs of the application. There are solid state diodes that can handle several thousand volts if the application needs it and vacuum tube diodes that can go even higher.
Full wave bridge rectifiers do not use center tapped transformer secondaries, but require the isolation the transformer provides or diodes will blow out in operation!
Four 9-volt batteries are connected in parallel how much voltage is active across the circuit?
Four 9v batteries connected in a parallel will still emit 9 volts because you are not increasing the voltage, you are increasing the life. To increase the voltage of four 9v batteries, you must connect them in a series; that series will emit 9v X 4(batteries), which equals 36 volts.
- The RELAY CIRCUIT used in electronics circuits for ,
- 1. It is used for general mechanical SWITCH.
- 2. It is used in High voltage switching mechanisms
- 3. It is used in High voltage and current Applications.
What does a material science engineer do?
Material Engineers bring valuable expertise in materials from mining to recycling. The job of a Material engineer is to produce, design and evaluate materials and their use.
A switchgear room is a room in a building which contains switchgear. It is typically a locked room in the ground floor of a building where the service enters the property. It would usually contain the supply authority's meters and the main protective devices (fuses, breakers) for the building's electrical installation. The room should not be used for storage or any other use.
A different answer
A switchgear room is an enclosed space - within an electrical power generating station or substation - in which are located high-voltage circuit breakers, protective relays, battery supplies, etc. The types of circuit breakers located inside switchgear rooms are indoor types and not suitable for locating in the substation compound. In the UK, these types of circuit breaker are typically metal-clad 11-kV oil circuit breakers (OCBs), and are supplied from primary (33/11-kV) transformers located in the substation compound and, themselves, supplied from outdoor-type 33-kV circuit breakers in the same compound.
Why input impedance of operational amplifier is infinite?
Input impedance (Zin) is assumed to be infinite to prevent any current flowing from the source supply into the amplifiers input circuitry. Infinite Input impedance is one of the Ideal Characteristics of the Op-Amp. With an assumption of Infinite Input impedance, there is no Loading on the preceeding stage to the Op-Amp (i.e. Supply.) or The Op-Amp under test does not draw any current from the I/p Supply to it's internal Circuitry.
China is, or used to be (the current material may be some made made material) china on power lines. The separators were made of china to insulate them.
Why doesn't series circuit work well for holiday lights?
Any gap anywhere in a series circuit prevents current flow in the circuit. That means that if a single
light in a series string burns out, they all go out. In order to determine which one failed, you have to
either inspect each little bulb with a magnifier and try to see which filament is gone, or else replace
one bulb at a time in the string until they all light up again.
What is the difference between electron beam and cathod rays?
X ray is light and belongs to the family of electromagnetic waves. It is said to be photon whose rest mass is zero. X ray does not have charge.
Electron is considered as particle which has mass, of 9.1 x10 -31 kg.
Electrons posses negative charge that equals 1.602 x 10 -19 C
How are voltmeter connected to circuit?
Usually a voltmeter is connected across the load whether or not it is AC (Alternating current) or DC (Direct Current). A voltmeter is never connected in series with the load as this may cause serious injury or damage. The meter will absorb the full potential .
What is the difference between a ganged potentiometer an an ordinary potentiometer?
A ganged potentiometer is two or more piggy-backed together that share a common shaft. Turn the shaft and you turn all the pots at the same time. Commonly used to adjust the volume or tone for both channels of a stereo amplifier at the same time. An ordinary pot has just one to a shaft!
Importance of color coding in carbon resistor?
color coding of resistor:black,brown,red,orange,yellow,green,blue,voilet,grey,white
these colors are ranked as:0,1,2,3,4,5,6,7,8,9
tolerance:silver,gold,no color
ratings:5%,10%,20%
Why does the chord of an electric heater not glow while the heating element does?
The element is made of special high resistance wire so the power is dissipated in the element rather than the low resistance cord.
Power(watts) = Resistance (ohms) X {Current(amperes)}squared
to determine the total resistance, you add them vectorilly,first find the inductive reactance of the inductor by the following formula: 2 pi F L (2x3.14 x frequency in herts x inductance in henrys) next, consider the inductive reactance and the resistance as the two sides of a right triangle and the hippotanus would be the total impedance.(this combined ''resistance'' is called impedance.) to determine the total resistance, you add them vectorilly,first find the inductive reactance of the inductor by the following formula: 2 pi F L (2x3.14 x frequency in herts x inductance in henrys) next, consider the inductive reactance and the resistance as the two sides of a right triangle and the hippotanus would be the total impedance.(this combined ''resistance'' is called impedance.)
What is super heterodyne receiver?
A superheterodyne receiver is a Radio Frequency receiver method that multiplies the received signal frequency with a local oscillator frequency to get frequencies that are the sum and difference of the 2 frequencies. For example, if the received signal is 5MHz and the local oscillator frequency is 4MHz, they are multiplied together. 1MHz and 9MHz frequencies would be gotten. Usually the 1MHz is the Intermediate Frequency (IF). It will be admitted (through a band pass filter) later passed through the required electronic circuits for proper processing. There is also the method of the Variable Tuned Filter.
Will the lightbulb be brighter in series circuit or brighter in a parallel circuit?
This question is the wrong way round. Assuming you the light bulbs are identical, they are brighter when connected to the power source in parallel than in series. This is because each bulb uses the entire potential difference of the power source, whereas in series, the bulbs act as potential dividers, reducing the voltage across the others and therefore the current passing through all of them.
What happen to current when paralle resistor added?
For the individual resistor, the current is constant, regardless of any other resister that's attached to it in parallel. The current that results from all the resistors combined decreases as the resistance of one or more of the resistors increases.
