Electronics Engineering

I would think field trips would present the opportunity for injury. It depends on what type of work you are involved in. If you work for a power company and need to go to substations or maybe go out in an emergency to assess storm damage you need to be alert at all times because in many cases one wrong move can be deadly. Going out on construction sites also requires vigilence. I have worked for a long time as a highway and bridge construction rngineer, and I did electrical engineering work in the Navy Seabees. I would say electrical engineering field work is about 10% more hazardous than civil. But that hazard goes down as your awareness of the hazards go up. Electrical engineering with no field work is safer than civil.

PCB traces are mostly made of copper although they are usually coated with other metals or alloys on the outer layers.

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When you insert a coin into a public phone it generates a tone for each type of coin inserted. therefore cannot be cheated by penies or nickels for quarters. The proper tone feedback tell s the phone co. the correct amount inserted.

A thermal diamond tester is a tool used by anyone interested in verifying that a gem is indeed a diamond. The tool uses electronics connected to a probe with a fine tip that reads the stone's level of thermal conductivity to positively or negatively test for the mineral diamond.

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Not very accurate, but I hope you can get the idea.

Most battery manufacturers provide such graphics on their Web sites.

Yes for instance a dipole will have a doughnut shape field and a directional like a yagie will have a long teardrop shape field at the front end and a shorter teardrop field at the rear and some smaler fields sideways and a parabolic disc wil have a very long teardrop shape field

In telephones, it is the hearing of one's voice in the receiver when one speaks. Too much sidetone make people speak lower and can cause feedback. Too little sidetone and people may think the phone is not working or may shout.

Many cell phones provide no sidetone and that is one reason people tend to shout into them.

T=1/f

.5=1/f

f=2

It depends on the resistance of everything connected between the terminals of the power supply.

If the resistance is infinite or very high, there is little or no current. As the resistance becomes less,

the current becomes greater.

In general, the current through a circuit with 90 volts applied to it is [ 90 / R ],

where 'R' is the resistance of everything across the 90-volt power supply.

Double Strength Billet (DSB) glass

arround 1 hour just joking around 7 hours at medium brightness and low volume.

A MCU is a electronic micro chip that can be programmed to control appliances in the outside world, it can control lights, motors and all kinds of electrical and electronic appliances like opening doors, controlling surveillance cameras, analog to digital conversion and many more. With one MCU, one can do the work of many other electronic components and logic chips, The 8-bit PIC® microcontroller solutions feature a powerful architecture, flexible memory technologies, comprehensive easy-to-use development tools, comprehensive application notes, complete technical documentation and post design-in support through a worldwide sales and distribution network. Microchip is committed to easy migration across product families, providing seamless program memory expansion, pin compatibility, and a unified development environment for all products

It's a constant horsepower

A: One example is the gain of an op amp the gain is strictly related to resistors in a closed loop. The gain will change % wise as the resistor change % wise

50%

It has several but one of the main ones is that it has built in frequency compensation, which its predecessor the 709 operational amplifier did not.

A: NO it cannot 500va is 500 x 1 amp = 500 watts you need a 700va to work properly,

Oersted first noticed this around 1820.

Any signal would have four states high indicated by 1, low indicated by 0, high impedance indicated by Z and unknown indicated by X.

An unknown signal often occurs when you have not connected the pin to anything or you are trying to take output from the pin while it is not really giving the proper output

Meaning of PLC

Because the two voltages are out of phase, that means that individually they peak at different times in the AC cycle, so in general if they are measured separately their sum will exceed the supply voltage, possibly by up to 41%.

6 dB is not good nor bad as an attenuation, if the context and the signal that is attenuated is not specified.

As a rule of thumb, addition between dBs is multiplication between linear attenuation, thus since 3dB is a division of the power by two, 6 dB means a division of the power by 4.

Just to give an idea:

In free space, without obstacles and reflections, the power of a normal voice attenuates 6 dB in dry air in about 230 cm (assuming 180° directional sound emission of the mouth, that is reasonable). This is the combined action of intrinsic air attenuation (the sound ordered power is converted by traversing air in disordered oscillations of molecules: i.e. heath) that is very small (about 1 dB/km) and of the increase of the area where the power is distributed, that going farer and farer from the source is a sphere of greater and greater radius so that power decrease due to this last effect as the square power of distance from source.

The humidity further reduces air intrinsic attenuation, but since the dominant phenomenon is the other, we can say that practically nothing changes.

If music is considered, the situation is more complex. Music frequencies are much more extended than voice frequencies and attenuation of the material depends on frequency (while attenuation due to distance does not, as it is intuitive).

High frequencies attenuates in air much more than low frequencies, for example 50 kHz attenuates about 0.9 dB/m in dry air for 180° directional sound emission.

Thus attenuation also imply a small distortion of music due to its dependence on frequency. However this effect is not so relevant to be problematic when hearing music in concert halls, due both to the small distance and to the logarithmic sensitivity characteristic of out ears. Moreover in concert halls there are a lot of reflections that are exploited in the design of a good concert hall to concentrate the sound on the public, thus the real attenuation is much reduced by the fact that power diverging from the source is redirected towards the hall center by reflections.

A problem to avoid in such a design is to exploit reflections from objects too far from the source or the hall. In this case reflections recover energy, but are also delayed with respect to the original sound, creating a bad echo effect.

Light exhibit similar behavior, but much more evident due to the huge frequency extension of visible light.