P
Phil Allison
"Chris"
** Then just measure the voltage across each resistor.
The readings are in *proportion* to the value of the resistors since the
current through them is the same.
Eg. say you get 12.7 volts and 55.0 mV.
Their ratio is 231 : 1
Tthe answer is then 100 / 231 = 0.433 ohms
......... Phil
You've got your 12V battery already. See if you can find a 100 ohm
resistor that's 3 watts or more. The better the precision and the
higher the wattage, the better. I like to scrounge power resistors
when I find them, so I've got a collection of 10 watt and up 1%
resistors to do this type of thing.
Now, hook up your battery in series with the 100 ohm resistor and the
coil, like this ....
** Then just measure the voltage across each resistor.
The readings are in *proportion* to the value of the resistors since the
current through them is the same.
Eg. say you get 12.7 volts and 55.0 mV.
Their ratio is 231 : 1
Tthe answer is then 100 / 231 = 0.433 ohms
......... Phil