Sometimes this reactivity of your airways after an infection is the first sign you have asthma. The bit of blood may be a little blood vessel trauma from forceful coughing. It is time to see your doctor for an evaluation. Hope this helps; take care:) ...Read more.
A solenoid is a type of electromagnet when the purpose is to generate a controlled magnetic field.If the purpose of the solenoid is instead to impede changes in the electric current, a solenoid can be more specifically classified as an inductor rather than an electromagnet. solenoid is a type of electromagnet when the purpose is to generate a controlled magnetic field.
The solenoid is a long cylindrical coil of wire consisting of a large no. of turns bound together very tightly. The solenoid of an automobile is associated with the starter system and transfers an electric current into the starter motor to set the engine into operation. solenoid valve is a type of valve that uses an electrical current to actuate or shift a spool or cartridge consisting of a solenoid coil and tube assembly. Basically, this â¦ valve type uses an electric current to shift a pin to perform simple A/B tasks such as open/close valve spools.