Electronics Engineering

To measure resistance, and to check continuity.

A circuit must have three basic components to make electricity flow.

1. Source of power or electricity.

2. Wires, switches and conductors through which the current can flow.

3. And finally a load to complete the circuit.

cause its bad,replace with higher wattage rating.too much current !!

A bandpass signal, xc(t), is a signal whose one-sided energy spectrum is both:

1) centered at a non-zero frequency, fC, and 2) does not extend in frequency to zero (DC).

The two sided transmission bandwidth of a signal is typically denoted by BT Hertz so that

the one-sided spectrum of the bandpass signal is zero except in [fC − BT /2,fC + BT /2]. This

implies that a bandpass signal satisfies the following constraint: BT /2 < fC. Fig. 1.1 shows a

typical bandpass spectrum. Since a bandpass signal, xc(t), is a physically realizable signal it is

real valued and consequently the energy spectrum will always be symmetric around f = 0. The

relative sizes of BT and fC are not important, only that the spectrum takes negligible values

around DC. In telephone modem communications this region of negligible spectral values is only

about 300Hz while in satellite communications it can be many Gigahertz.

A pressure gauge is attached to the proper fitting on a bench with valves and tubing. A known weight pressurizes a piston. That pressure goes to the gauge being calibrated and the N.B.S. certified gauge. The two are compared at several points called out in the test procedure. Adjustments are made to the mechanical linkage between the gauges internal tube and the indicator needle to make it read within an allowable percentage of deviance.

The mathematical formula to solve this is P= I x R

In other owrds the amps x the voltage = watts.

2.2 amps x 120 volts = 264 watts

Yes, you can however the distance that a signal may be travel depends on the power and frequency of the signal. For signals at the same power a lower frequency signal will travel further.

No, when current flows to all parts of a circuit, the circuit is actually closed and complete. An open circuit is one where there is a break or interruption in the flow of current, preventing it from completing the full loop.

superconductors

A: The pad is not clean it has tarnish or wrong solder with not enough soldering flux. Finally not enough heat.

The rays produced in a cathode tube in early experiments were actually just streams of electrons. They had a negative charge, which was discovered by JJ Thomson when he placed a magnet next to his cathode ray tube and say the ray bend.

When capacitors are connected in parallel, you add up their capacitances to obtain the overall capacitance of that 'bank'. The main reason for using two capacitors in parallel when decoupling, is that they have a lower overall inductance (electrical resistance in essence) to one large capacitor, which improves the decoupling effect. Using two capacitors also provides better high-frequency filtering for the power bus. One minor advantage of this, is that, you can obtain a certain redundancy when using two smaller capacitors in parallel, instead of only one, as if one capacitor fails, the other still acts to decouple the circuit, to a certain extent. Source: http://www.cvel.clemson.edu/emc/tutorials/Decoupling/decoupling01.html (this article uses other sources to back up their statements)

25microsec

In parallel wiring both headlamps get the power like two dogs pulling on separate leashes. That way, if one headlamp goes out the other still works. The other method of wiring, series, is like one dog's leash hooked to the collar of the other dog. If one leash (headlamp) breaks, both dogs quit pulling. It is a safety measure.

This depends on the signal and the type of cable. Standard definition digital video signals can be run for 1000 feet or more with low loss broadcast standard cable. HD is limited to around 400 feet with the same cable. However, there are always lower loss cables available to extend the maximum distance.

In the home, co-ax cables are often good for in excess of 100 feet although it depends very much on the signal source, the receiver and the cable itself.

Requirements to become an engineer vary in each country. In the United States, ABET (Accreditation Board of Engineering Technology)is a non profit organization that accredits United States postsecondary degree programs in applied science, computing, engineering, and technology to qualify universities for their degrees. To meet ABETs requirements, students need to fulfill the determined class work qualifying the graduate title of engineer. These classes are prominently heavy in physics, math, chemistry, biology. Once the student enters his junior year, he/she will declare a specific degree (electrical, mechanical, etc) which will focus specific classes pertaining to that field of study. Many companies will not consider degrees if their university was not ABET accredited.

To provide engineering to the public (construction, power grid, etc) some countries require a Professional Engineering license in which the graduate will have to sit first for the EIT (Engineering In Training) exam and then, 3 years later, can sit for the PE (Professional Engineer) exam.

In the US, there is no restriction who can claim the title of engineer, i.e. train engineer, maintenence engineer, Information Technology Engineer regardless of the above education. Though in Canada, it is illegal to claim title of engineer without their accrediation of education.

You need a positive input to operate the transistor and since most circuits are negatively grounded when the transistor is not in use it has a negative input current thus using less power most of the time.

• bipolar devices use both majority and minority current carriers
• unipolar devices use only majority current carriers

The element mercury is one of the poorest conductors of the elemental metals. The alloy nickel-chromium (Nichrome) is very resistive and is used to construct the heating elements in many appliances incorporating a thermal source. Saying that a metal is a "bad conductor" can only be supported by a comparison. As thermal or electrical conductivity was not specified, we can only say that in metals, the effectiveness of a metal in conducting one is generally an indication of its effectiveness in conducting the other. Metals that conduct electricity well also usually conduct heat well.

1 amp.

Current, voltage and resistance are related by the Ohm's law formula which states that current is directly proportional to the applied voltage and inversely proportional to the resistance at a constant temperature.

Stated mathematically:

I = E/R

where I = current in amperes, abbreviated to A

E = voltage in volts, abbreviated to V

R = resistance in ohms, usually signified by the Greek omega Ω

Could you please explain your question more fully?

Is it the last part of a longer question?

There are many types and sizes of cathode ray tubes, which weigh different amounts.

Regards

George