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
Seasonal allergic rhinitis is the medical term for hay fever. Rhinitis means inflammation of the inside of the nose. Some people also experience hay fever-like symptoms when exposed to other allergy-triggering substances, such as dust mites and animal fur. Read more about other types of allergic rhinitis.