noun
definition
An electrical resistor, with two terminals, whose resistance is continuously variable by moving a knob or slider.
Examples of rheostat in a Sentence
All the ozone generators feature a rheostat control for adjustable ozone production.
All the ozone generators feature a rheostat control for adjustable ozone generators feature a rheostat control for adjustable ozone production.
The microscope has an epi-illumination system, with rheostat controlled 6v 20 watt quartz halogen system with full bulb adjustment.
An overnight charge will allow a full 8 hours use with rheostat brightness control.
Suppose the key to be depressed, then a current flows through one winding of the differential relay to line and through the other winding and rheostat to earth.
Now if the values of the rheostat and condenser are adjusted so as to make the rise and fall of the outgoing current through both windings of the relay exactly equal, then no effect is produced on the armature of the relay, as the two currents neutralize each other's magnetizing effect.
When the key is in the middle position, that is, not making connexion with either the front or back contacts, the received currents pass through both coils of the relay and the rheostat; no interference is, however, felt from this extra resistance because, although the current is halved, it has double the effect on the relay, because it passes through two coils instead of one.
The framework carrying the clamps is arranged so that a number of determinations may be made at one time, the wires from the clamps running from a rheostat, so arranged that currents of any strength may be used simultaneously.