A hydraulic resistor is a narrow section of a pipe that causes the pressure top drop in the direction of flow. Similarly, and electronic resistor is a partial blockage in a wire that causes a drop in voltage in the direction of flow.
Also see website: [ Ссылка ]
According to Ohm's law, the drop in pressure (voltage) across a resistor is proportional to the flow rate (current) through the resistor.
For an electronic resistor, the constant of proportionality is called the resistance, and the units are volts per amp, or Ohms. For example, a 1-ohm resistor has a voltage drop of 1 volt for 1 amp of current, 2 volts for 2 amps of current, and so on.
You can imagine a similar behavior for a hydraulic resistor. The more water you push through the narrow point in the pipe, the greater the pressure drop across the resistive point.
Ohm's law is probably more accurate for an electronic resistor than a hydraulic one. An actual hydraulic resistor might not show an exact linear relationship between flow rate and pressure drop. In both cases, however, the law is an approximation that holds true for given range of flow rates and pressures (currents and voltages).
Flow through a resistor converts potential energy into heat. The rate at which heat is produced is the pressure drop in kPa multiplied by the flow rate in liters per second; or the voltage drop in volts multiplied by the current in amps. In both cases, the power units are Watts.
This is one of several videos on electric circuits and the hydraulic analogy:
1. Introduction: Charge, Voltage, and Current; [ Ссылка ]
2. Force, Energy, and Power, [ Ссылка ]
3. Resistor Behavior (this video)
4. Capacitor Behavior, [ Ссылка ]
5. Inductor Behavior, [ Ссылка ]
6. Inductor-Capacitor (L-C) Oscillator, [ Ссылка ]
