Voltage is analogous to pressure, so the voltage rating is the same thing as the pressure rating on a pressurized tank. If you apply too much pressure, both a capacitor and a tank will explode.
Speaking roughly, normal levels of thyroid-stimulating hormone (TSH) are in the range of 0.4 to 4.0 mIU/L. However, each laboratory and test manufacturer identifies its own normal TSH range. This is based on the test, the equipment being used, and the patients being tested.
the official normal range of tsh followed by many doctors and laboratories until 2002 was from between 0 5 to 5 according to this tsh range a tsh over 5 indicated an under active thyroid or hypothyroidism while a low tsh value below0 5 indicated an overactive thyroid or hyperthyroidismo be more specific normal tsh can range from between 0 3 to 5 for instance a person with a tsh range of 4 5 is considered normal by one physician where as another physician can diagnose it as hypothyroidism and begin with the treatment