rheostat

/ree-uh-stat/US // ˈri əˌstæt //UK // (ˈriːəˌstæt) //

流变器,变阻器,变频器,流变仪

Definitions

n.名词 noun

1
Electricity.
- : an adjustable resistor so constructed that its resistance may be changed without opening the circuit in which it is connected, thereby controlling the current in the circuit.

The binding post E of the rheostat is connected to the base binding post J.
This can, however, be accomplished by means of a small rheostat placed in series with the motor.
The rheostat acts in an electrical circuit in just the same way a valve does in a hydraulic circuit.
A very simple and inexpensive rheostat may be constructed as follows: Procure a piece of thin fiber, about 1/16 in.
That gives you your direction, and the rheostat here at the belt changes the velocity.