• Transformers (electricity)?

    Hi. I understand how a basic transformer works : current flow trough a primary coil with N1 turnings, and since it s AC current, the coil wants to keep the magnetic flux constant, so it builds up a changing magnetic field to avoid changings of current. For the same reason, when current stops to flow it destroys its... show more
    Hi. I understand how a basic transformer works : current flow trough a primary coil with N1 turnings, and since it s AC current, the coil wants to keep the magnetic flux constant, so it builds up a changing magnetic field to avoid changings of current. For the same reason, when current stops to flow it destroys its magnetic field inducing a voltage in the second coil, wich has N2 turnings. Their placed togheter under an iron core and if N1 < N2 primary coil will induce a higher voltage on secondary coil (and vice versa). Is all I said alright ? Now there s a thing I don t understand. The output current is not always the same considering transformers with the same output voltage. I see 5V 1A, 5V 500mA, 5V 100mA. What does the output current depend on ??? Has this to do with wire diameter ?
    5 answers · 11 hours ago
  • How is oil extracted from the ground?

    7 answers · 3 days ago
  • Is the wattage rating of a lamp the real wattage or the incandescent equal wattage?

    Best answer: Watts are a unit of electrical consumption. In lighting the light output and bulb temperature varies considerably according to the type of bulb. So you need to decide if your new bulb runs cooler than, presumably, the old incandescent 40 watts. All the latest CFL and LED bulbs run much cooler that the old bulbs so... show more
    Best answer: Watts are a unit of electrical consumption. In lighting the light output and bulb temperature varies considerably according to the type of bulb. So you need to decide if your new bulb runs cooler than, presumably, the old incandescent 40 watts. All the latest CFL and LED bulbs run much cooler that the old bulbs so your 30w will be fine in a lamp that took 40w in filament bulbs. Hope I haven't sent you to sleep.
    4 answers · 9 hours ago
  • Is it true that a Toyota Prius will explode during an eclipse?

    Best answer: By gum you are on to something
    Best answer: By gum you are on to something
    5 answers · 2 days ago
  • Are there security systems that make countdowns?

    My ex girlfriend tells me her mother installed a secuirty system which is designed to make a countdown, the moment it goes off. Like if someone passes the sensor, it will start t countdown, and can only be disabled if the person gets to th control panel and puts a code. Is there really a secuirty system that does... show more
    My ex girlfriend tells me her mother installed a secuirty system which is designed to make a countdown, the moment it goes off. Like if someone passes the sensor, it will start t countdown, and can only be disabled if the person gets to th control panel and puts a code. Is there really a secuirty system that does countdowns and goes off when times up?
    6 answers · 3 days ago
  • Doubt in electrical circuits?

    Best answer: The truly correct answer gets into transmission line behavior. That was a senior year electrical engineering college class for me. For you, today, you can assume that electricity flows infinitely fast, and that the current encounters the combined resistance at a single point, all at once. That's not a... show more
    Best answer: The truly correct answer gets into transmission line behavior. That was a senior year electrical engineering college class for me.

    For you, today, you can assume that electricity flows infinitely fast, and that the current encounters the combined resistance at a single point, all at once. That's not a perfect model, but it will work for any problems you will encounter in class, and is good enough for most "real world" situations.

    (Looking ahead, if you're electrical engineering college bound): If your resistor network is (for example) a foot away from the battery, it will take about a billionth of a second for the electrical wavefront to reach the network after you close the switch at the battery. During that billionth of a second, the current will be limited only by the internal impedance of the battery, and could be quite large. After that billionth of a second, a reverse voltage wave form (representing the drop across the resistors) will travel backwards, and the system will achieve steady state.

    Again, for you, today, just worry about the steady state current.
    14 answers · 6 days ago
  • When will i be an engineer? forget exam even preparing for is so vast syllbus, i will need a laptop and 3 years of isolation?

    Best answer: That is why you go to college, to get it done in controlled pieces. Besides in most states you have to have a degree from recognized college before you can take the exam.
    Best answer: That is why you go to college, to get it done in controlled pieces. Besides in most states you have to have a degree from recognized college before you can take the exam.
    5 answers · 3 days ago
  • Could a Star Wars Thermal Detonator be created using advanced knowledge and engineering and a tiny amoeba sized speck of fissable hydrogen?

    Like an extremly extremely small hydrogen bomb?
    Like an extremly extremely small hydrogen bomb?
    7 answers · 5 days ago
  • How do you calculate sq meter?

    4 answers · 2 days ago
  • Where is the gas cap on my Tesla?

    16 answers · 1 week ago
  • What is it called when a robot learns?

    5 answers · 4 days ago
  • What can shield a person from this technology? It is between 1 MHz and 40 Ghz of mixed signals?

    Best answer: I'd imagine a Faraday cage could. Maybe even a couple Faraday cages of overlapping sizes. It's how most RFID blocking wallets and bags work. In fact some police use RFID blocking bags (with a metal mesh) that blocks wifi and other network signals to prevent a suspect from remote wiping their phones. A... show more
    Best answer: I'd imagine a Faraday cage could. Maybe even a couple Faraday cages of overlapping sizes. It's how most RFID blocking wallets and bags work. In fact some police use RFID blocking bags (with a metal mesh) that blocks wifi and other network signals to prevent a suspect from remote wiping their phones.

    A simple example of a Faraday cage is the honeycomb mesh on the door of a microwave which blocks radio wavelengths of certain frequencies.
    5 answers · 4 days ago
  • Where can I find blueprints to 3D print Transformer figurines?

    Best answer: Just forget it, that;s all. They aren't just licensed, they are secret. The models are locked in a vault and only authorized people have access. If you want them, you will have to draw them yourself. It's not a joke - we toured LucasFilms and they had tighter security than Fort Knox. And we could only... show more
    Best answer: Just forget it, that;s all. They aren't just licensed, they are secret. The models are locked in a vault and only authorized people have access. If you want them, you will have to draw them yourself. It's not a joke - we toured LucasFilms and they had tighter security than Fort Knox. And we could only go, with our escort, to certain designated places. Without a solid inside connection, Pixar is closed to all but employees, all the time.
    4 answers · 3 days ago
  • How do you conduct electricity on a rotating component?

    Best answer: It is called a commutator. They take the form of slip rings and brushes. Look it up. Just use it for power. Send your data wirelessly.
    Best answer: It is called a commutator. They take the form of slip rings and brushes. Look it up. Just use it for power. Send your data wirelessly.
    4 answers · 3 days ago
  • Do very high frequencies through a bypass capacitor cause a short, and therefore (near) infinite current?

    Best answer: A bypass capacitor's intended function is to provide a short circuit across a circuit resistance to prevent a Voltage from being developed across that resistance at the unwanted higher frequencies. The Voltage source for those undesired high frequencies usually has a very high internal impedance at the higher... show more
    Best answer: A bypass capacitor's intended function is to provide a short circuit across a circuit resistance to prevent a Voltage from being developed across that resistance at the unwanted higher frequencies. The Voltage source for those undesired high frequencies usually has a very high internal impedance at the higher frequencies and it is that high internal impedance that limits the current through the bypass capacitor rather than the reactance of the capacitor at higher frequencies.
    Note: The maximum short circuit current that can be drawn from any Voltage source at any particular frequency is determined by the internal impedance of that Voltage source at that particular frequency.
    10 answers · 7 days ago
  • What exactly is the name of valve electric actuator?

    who knows it?
    who knows it?
    5 answers · 4 days ago
  • What kind of packaging foam is this? Can i use this as insulation for a cooled water hose?

    What kind of packaging foam is this? Can i use this as insulation for a cooled water hose?

    I am making a small water cooler using peltier modules. Can i use this foam to wrap around the hoses that has cooled liquid passing through them? will it insulate the hose and liquid from ambient heat?
    I am making a small water cooler using peltier modules. Can i use this foam to wrap around the hoses that has cooled liquid passing through them? will it insulate the hose and liquid from ambient heat?
    4 answers · 3 days ago