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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 Definition for ohms?

Ohm is the unit for electrical resistance. The definition is given by Ohm's Law: resistance = voltage / current; in SI units: ohms = volts / amperes. For example, a resistance of 1 ohm would result in 1 ampere of current for every volt applied.

What crystals are used in solar batteries?

A battery is an energy storage device (among other things). A solar battery is a term that might generally be used to describe an electrical storage battery that uses solar energy to charge it up. In that case, the solar cells, those photovoltaic cells that convert the electromagnetic energy of sunlight into electrical energy, are actually semiconductor crystals. Silicon forms crystals, and if we add things to it, we can give it different properties. Semiconductors are those "solid state" devices made usually of silicon which has some other elements added to it to create the actual semiconductor crystal structure. This crystal structure, whether it is a simple transistor or a hugely complex microprocessor, is manufactured with a set of desired properties in mind. In the case of the solar cell, the semiconductor matrix is made to convert light directly into electricity to charge the battery.

What stops the flow of electricity?

Turn off the switch, generator runs out of fuel, wind not turning the windmill, solar panel at night, diode, insulation.

Does varying the resistance in the secondary circuit cause a change in both the input and output currents to keep the power on both sides equal on a transformer?

The simple answer is "NO". Whatever is tapped-off of the secondary, or otherwise modified, does in no way diminish the laws of transfer of power from one winding to the next, or available potential. Whatever is actually realized at the secondary will never be 100% of the input due to losses in transfer, such as heat losses. * I'm still not sure but having thought about it more I now think that if you increase the resistance in the secondary circuit and therefore decrease the secondary current, without changing either voltage, the power on the secondary would fall with the current. The primary power would also have to fall to remain equal to the secondary power (heat losses aside), and the primary current would also fall. Is this correct? Thanks Yes. Because a transformer is very efficient, power measured on each side is almost the same. P = VI = vi The voltage ratio V/v depends on the number of turns in the windings and is therefore constant. Decreasing resistance on the secondary side allows an increase in the current. Current on the primary also increases because power in is equal to power out.

How does the coffee pot work?

http://www.howstuffworks.com/coffee-maker.htm

How Stuff Works Provides many useful explanations of how things work.

Do professional power amplifiers work well in home audio?

It will if you have proffessioanal equipment to go with it ( speakers ) the amp has to be around the same wattage of the speaker or you will get distortion

What is homing signals?

A homing signal is a signal that alligators send to each other at their homes to tell them where they are.

How much current is flowing in a wire 4.80 m long if the maximum force on it is 0.705 N when placed in a uniform 0.0800 T field?

Using the formula F = IBl

with F as max force, I as current, B as the mag. field, and l as the length of the wire.

We change it so that we can solve for I

I = F/(Bl)

After, you plug in what you know to get hey you, yeah u look over there not

I = 0.705 / (0.08 x 4.8)

here

so

don't

go

snooping

>:D

Now just solve.

What is an darlington array?

An integrated circuit with several darlington transistors on it. Usually they are independent darlingtons.

Difference between minor lobes and side lobes?

The minor lobe is divided into two parts; side lobe and back lobe. Both side lobe and back lobe could be called minor lobe.

What is the symbol for an inductor?

The inductor symbol resembles a coil of wire of 3 to 5 turns.

Why there is algebric sum of the resistances in the series combination?

Ohms Law will be helpful in seeing how resistances add up. Let's assume you have a 10 ohm and a 20 ohm resistor in series and 30 Volts. across the series.

Ohm's Law states that Voltage = Resistance x Current. If we describe the 10 ohm resistor as R1 and the other as R2 then the voltage drop across R1 is V1 and V2 is the drop across R2. This can be written V1 = R1 x I1 and V2 = R2 x I2. Since the total voltage must equal the sum of the voltage drops then Vtot = V1 + V2. Also Itot = I1 + I2. Substituting we get Vtot = (I1 x R1) + (I2 x R2) = (I1 + I2) x (R1 + R2). And Vtot = Itot x Rtot so Rtot = R1 + R2.

In example 30 Volts = Itot x (10 + 20) or Itot = 1 amp.

What happens if the resistor in RC circuit is removed and the capacitor is directly connected to power supply?

If by power supply you mean a voltage source, it really won't matter that the resistor is removed. The voltage source will provide infinite current, instantly charging the capacitor so that the capacitor's voltage is equal to the source.

Alternative Answer

If you are referring to an a.c. circuit, then a load current will continue to flow with its value being determined by the capacitive reactance of the circuit, and the resulting phase angle will lead the supply voltage be very close to 90 degrees.

Which voltage is greater in thyristor whether forward breakover or reverse breakdown voltage?

One voltage is greater in thyristor whether forward breakover or reverse breakdown voltage. The greater of the two voltages in thyristor is forward breakover voltage.

What are the advantages and disadvantages of the VOM as compared to the electrical measuring instrument?

As a VOM (volt-ohm meter) is one type of electrical measuring instrument, it is unclear how to answer this question.

It is almost as if you had asked "What are the advantages and disadvantages of the banana as compared to the edible plant part?"

Why are inductors connected in series?

Inductors are connected in series in order to increase the inductance in the circuit.

What are five major components of telecommunication system?

A communication system can be represented by the following flow:

Transmitter --------> Channel ---------> Receiver

The transmitter is input or source component. It is also responsible for any encoding of the information if applicable.

The channel is responsible to transfer the information from the source to the destination without distortion or loss of information. Channels tend to be affected by external signals or noise. To achieve this a variety of "protocols" or rules are used.

The receiver is the output or destination component. This responsible for receiving the message in the form transmitted, decode it if applicable and render the original information.

What is astable multivibrators?

An astable multivibrator [also known as an oscillator] is a circuit built so that it does not come to rest in one single state but switches between them continuously.

Spread spectrum techniques fhss and dsss?

"Direct Sequence Spread Spectrum (DSSS)

DSSS multiplies the data bits by a very fast pseudo-random bit pattern (PN sequence) that "spreads" the data into a large coded stream that takes the full bandwidth of the channel. DSSS is the basis for CDMA cellphones and 802.11 Wi-Fi wireless transmission. For a technical example of DSSS technology, see cdma.

Frequency Hopping Spread Spectrum (FHSS)

FHSS continuously changes the center frequency of a conventional carrier several times per second according to a pseudo-random set of channels, while chirp spread spectrum changes the carrier frequency. Because a fixed frequency is not used, illegal monitoring of spread spectrum signals is extremely difficult, if not downright impossible depending on the particular method. FHSS is the transmission technology in Bluetooth. See integrated-business-systems-and-services-inc, wifiand bluetooth."

From spread-spectrum

What is electromagnetic flux?

The electromagnetic force is a force that is expressed as (or that "shows up as") a "field" or a "group of lines of force" around the source. Electromagnetic flux is a direct reference to those magnetic lines of force. Electromagnetic flux is the electromagnetic field or the group of electromagnetic lines of force around the source. All the following sentences say the same thing: The electromagnetic flux around the magnet was very high. The magnetic flux around the magnet was very high. The magnetic field around the magnet was very large. The flux around the magnet was very high. The field around the magnet was very large. There were a large number of magnetic lines of force around the magnet making the field strength very high.