Do it yourself. The equation is Xc = 1 / (2 pi f C). Be sure to convert microfarads to farards, first!
Yes, generally, all other things being the same. By all other things I mean the capacitance, the type of capacitor for the application, etc.
I came up with 14.8 khz, is this right?
You need to use the 250 Ohm resistor in series with HART protocol communication because it acts as a shunt resistor.
A transformer is a power source. It will provide voltage to a device. Find the voltage rating on the device, say 24V. 250/24 = ~10A.
ONE
1/(2 x 3.142 x f x C) where f is frequency of the supply & C is capacitance in farads. for example mains frequency of 50Hz and capacitor of 1uF = reactance of 3182 ohms. Watts = (volts) squared / reactance = 250 volts sq / 3182 = 19 watts then multiply by time. Other factors involved but just approximation.
how much resistance must be connected in series with a 250 ohms inductive reactance to produce a total ciruit impedance of 400 ohms?
speed = wavelength * frequency wavelength = 102 meters frequency = 250 Hz = 250 cycles/second 102 * 250 = 25500 meters/second
Yes, generally, all other things being the same. By all other things I mean the capacitance, the type of capacitor for the application, etc.
I think it might be 20KHz. Q= frequency over bandwidth
Period = 1/frequency = 1/250 = 0.004 = 4 milliseconds
0.004 seconds
Yes. The 250 voltage is a not-to-exceed rating.
It is three times the fundamental frequency. Scroll down to related links and look at "Calculations of Harmonics from Fundamental Frequency".
Category 6
300
One second 0.004