How can I calculate the voltage drop on a resistor if no current? I use an N-channel MOSFET and I want to put a resistor between the gate and the positive terminal of the battery but max. Vgs is 20V and my battery bank is 45V.
If you connect a 10k ohm resistor to the 45V in series with 3.65K ohm resistor to ground, then the junction of the two, connected to the MOSFET gate, will be at about 12V.