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
Signs and symptoms of allergic rhinitis caused by mold allergy can include: Sneezing; Runny or stuffy nose; Cough and postnasal drip; Itchy eyes, nose and throat; Watery eyes; Dry, scaly skin; Mold allergy symptoms vary from person to person and range from mild to severe.