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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
Difference between analog and digital signal processing?
we can do analog signal processing also but it is very expensive as comparing with digital signal processing that's why we generally choose the digital signal processing.DSP allows programmable operations.But we cannot do in ASP.
What are robots used in car factories?
Depends on what kind of robot. A simple robot that can be easily built into different robots is the LEGO Mindstorms NXT. Go to www.lego.com for more info.
Ohms is a measure of impedance (resistance), not volume.
What is 9.54 kilo ohms converted to ohms?
When we see the prefix kilo, it means times one thousand, or x 1000. If we have 9.54 kilohms, we have 9.54 x 1000 ohms = 9,540 ohms.
Paul Baran originally invented the packet switching concept in the early 1960's. Donald Davies also independently invented the idea a few years later. Then, Leonard Kleinrock conducted early research in the related field of digital message switching. He also helped build the ARPANET, the world's first packet switching network.
Working of half wave rectifier?
How many directions does current flow through a diode?
A diode allows only current flow in one direction under normal operation. Exceed the operating voltage and it can break down allowing bi-directional flow.
What components make up an electrical circuit?
Electricity is the interaction of many components. These include electric charges, electric fields, electric potentials, electric currents, and electromagnets.
Can you use transistor as a rectifier?
No, a Transistor operates with a modulated direct current. You need 4 Diodes to manufacture a rectifier to deliver direct current at the outlet, with alternating current at the input. A Diode is effectively a one way valve to address one halve of the cycle of the alternating current.
What is the resistor color code used for?
Resistors are quite small.
We use colour codes in order to be able to fit a lot of information in little space.
Each colour represent a number.
Each band of colour have its own representation.
On a 4 band resistor, the first two are actual values, the third is a multiplier and the fourth is accuracy.
Please check out related question and answer down below for more information.
It is a TRI State (3 state)Register (TRISA, TRISB etc)
- Output High
- Output Low
- Input (High Impedance)
A Smoothing Capacitor is a capacitor which helps to smooth out fluctuations that may exist on a power supply line.
Working of RC coupled amplifier?
In a two stage RC coupled amplifier, the two transistors are identical and a common power supply is used. The input is provided to the first stage of the amplifier where it is amplified and this output is used as input for the second stage. This is amplied once again by the other transistor in the second stage and the final output is obtained. There will be a 180 degree phase shift after the first stage amplification which is nullified by the 180 degree phase shift of the second stage amplification.Thus, we obtain an output which is an amplified signal of the input and is in phase with the input signal.
A 120 V power supply connected to a 30 ohm resistor will produce how many amps of current?
A 120V power supply connected to a 30 Ohm resistor will produce 120/30 or 4 amps of current.
What are the advantages of sinusoidal pulse width modulation?
1. Cheap to make.
2. Little heat whilst working.
3. Low power consumption.
4. Can utilize very high frequenzies (50-100 Khz is not uncommon.)
5. Very energy-efficient when used to convert voltages or to dim light bulbs.
6. High power handling capability
7. Efficiency up to 90%
The rules of connecting voltmeter and ammeters in the circuit?
Connect ammeter in series and voltmeter in parallel to the circuit
What are applications of delta modulation?
Delta modulation is extremely important for high-tech lives that humans live today. Delta modulation is basically analog to digital and digital to analog signal providers, allowing for radio communication devices such as TV remotes.
Which metal is used for electrical contacts?
Copper is used the majority of the time.
Gold is sometimes because it does not corrode.
Tungsten is used in light bulbs because it is a good resistor and resists the flow of electrons.
Aluminum and silver are also sometimes used.
There is also some recent research in safely using sodium and lithium.
Why -48v DC is used in telecom?
In earlier days of telephone networks, 48V DC was once found to be suitably high to be able to make telephone work on long telephone lines and still low enough not to cause serious danger if somebody touches the telephone wires. Telephone central offices (exchanges) so started using 48V DC. Even when newer automatic exhanges were setup, they were designed to make use of existing 48V battery sets and arrays which were available with telecom service providers. This legacy design practice has been continued and over many decades all new telecom devices have been designed to work with 48V.
The positive grounded or -48V system is also from telephone history. The negative voltage on the line was better than positive to prevent electro-chemical reactions from destroying the copper cable quickly, if cables get wet
Ans- It is because of cathodic protection. It reduces the sulphation on the battery terminals.
What happens to the current when more resistors are added in series?
Current decreases
When voltage remains constant and resistance increases the current in the circuit will reduce.
More information
V=IR
where V is voltage,
I is current and
R is resistance.
From the above equation,
R=V/I, and hence resistance is indirectly proportional to current.
Therefore, an increase in resistance would have the effect of decreased current.
NB: this holds true only as long as the voltage remains constant.
Another opinion
However, this is only true in the case of a circuit connected in series.
When circuits are connected in parallel, the opposite happens. If there is an increase in the amount of resistors in parallel, the total resistance of the circuit then decreases and the current increases subsequently.
Yet another view
No, that's not stated right.
If more resistors are added in parallel - so that the circuit's overall total resistance decreases and its total current increases - that is NOT in any way the opposite of what this question is asking about...
Let's make this crystal clear, so that there is no confusion: "an increase in the amount of resistors" is NOT the same as "an increase in resistance".
So a parallel circuit behaves EXACTLY the same as a series circuit: if its overall resistance increases, the overall current going through the parallel circuit decreases AND if its overall resistance decreases, the overall current going through the parallel circuit increases.
Actually, the second opinion is correct
In a parallel circuit, there are more branches to allow electrons back to the power supply, so current increases. With more resistors in a circuit, the overall resistance in a parallel circuit DECREASES.
In a series circuit, current is the same throughout. So if more resistors are added, resistance INCREASES and so current DECREASES.
Ohm's Law: Current = Voltage divided by resistance
9 volts divided by 3 ohms = 3 amperes.
Why is it important to handle components properly in a computer?
Improper handling can completely destroy (or severely damage, causing a delayed failure) many electronics components, without the person handling them becoming aware that anything had even happened at the time the part was destroyed (or severely damaged).
