Green
Red
Brown
You need to use the 250 Ohm resistor in series with HART protocol communication because it acts as a shunt resistor.
yellow-violet-brown
The current would be about 20 volts.
3
Green, Black, Orange, (gold / silver) Green = 5 Black = 0 Orange = x10^3 50x10^3 = 50,000 or 50k Ohm
orange-orange-orange
You need to use the 250 Ohm resistor in series with HART protocol communication because it acts as a shunt resistor.
A 0.1 ohm resistor is color coded brown (1) black(0) silver (x 10-2).
470K ohm at 5% tolerance
Green - Black - Red, but this is not a standard value. You probably want a 5.1K resistor, and that is Green, Brown, Red
Green, Black, Black, Brown!
yellow-violet-brown
The current would be about 20 volts.
1amp
Basically you can either read the resistance that is printed on the resistor (with a special color code, which you would have to learn), or you can use Ohm's Law, by measuring a voltage through the resistor and the corresponding current. I am not aware of any third method.
3
Green, Black, Orange, (gold / silver) Green = 5 Black = 0 Orange = x10^3 50x10^3 = 50,000 or 50k Ohm