A rheostat is a device which is used to vary the resistance in an electrical circuit without interrupting the circuit.heostats are a kind of potentiometer. These devices can be used in a variety of settings, and are usually designed to be sealed so that environmental factors cannot interfere with the function of the circuit.
This chemical can cause allergic rhinitis and its symptoms, including a runny nose, sneezing, and itchy eyes. In addition to tree pollen, other common allergens include: grass pollen
ALLERGIC RHINITIS SYMPTOMS. The symptoms of allergic rhinitis vary from person to person. Although the term rhinitis refers only to the nasal symptoms, many people also experience problems with their eyes, throat, and ears. In addition, sleep may be disrupted.