Heres my problem.. dont got a scanner so I'll type it to my best For our purposes anything that is in ohms = resistor Got a big test tomorrow would be nice if I got help before I goto sleep thanks in advanced
don't ---- with the resistors... no resistors - indefinite amperage at 100V = ----load fo heat... Design a circuit that will heat water the fastest A. Draw a diagram of the cirucit http://img456.imageshack.us/img456/5551/h20aa9.jpg B. Determin the total current in the circuit. infinite(until wires melt) C. Place the ammeter in the circuit to read the total current wouldn't work... but anywhere really D. Place the voltmeter in the circuit to read the Volatge (v) of the resistor with the greatest power place it on the wire as it's the most powerful resistor. E. What is the total power of the circuit? indefinite F. It takes 4.18 Joules to bring 1 gram of water to 1 degrees celcious. How long will it take to Bring 200grams of water from room temprature (20 degrees Celcius) to a boil (100 degrees Celcius)in theory, instantly. they never said it needed to be safe, right? based on the following forumula.. V= AΩ then 100V=A*Ω if Ω= a very low number then A will be very high. VA = W = A^2 Ω again, wrap the resistor(the wire) around the water container.
thanks, but some of that stuff you supplyed me is insignificant (to my knowledge) and the diagram is wrong thanks for helping though, had my test today fairly easy.. You mind explaing the last one though? never seen that equation before
V= AΩ voltage = amperage * resistance. Sometimes noted as V=IR it's essentially the definition of resistance as an ohm is defined as 1V/A, so V/A=Ω which can be solved to equate V= AΩ if you don't like my units, then join the club, my physics teacher hated me for it as the official SI units are noted as V(voltage) I(current) R(resistance) P(power) whereas I define them by the units V(voltage)A(amperage)Ω(resistance)W(wattage) almost the entirety of the males in my family majored in some form of engineering and it rubbed off on me(in real-world application within the US no one uses SI and from my understanding, even in Europe the other units are used very commonly). ========== also, empirically, the diagram is entirely correct. You'de have infinite power draw if the wires had no resistance and the powersupply put out 100V constantly. V=IR, and V is constant 100V and if resistance was infinitesmal then the amperage would be indefinite. You would have an infinite amount of power flowing through those wires. In the real world, this wouldn't happen, the PSU would overvolt, undervolt or otherwise fail to run and the wires would either melt or catch fire rather rapidly from the heat. In short everything would fry. That's why electrical fires happen. Something shorts the circuit and there is not enough resistance, then a ----load off current flows through the circuit, something gets hot and fire soon follows.
ok now I understand, thanks. The thing that I think you didnt fully understand is that the water heaters were to be treated as resistors rather than water heaters. Somehow that confused me lol
