Unit PH
Name petahenry
Category Inductance
Details Unit PH stands for petahenry, which is a derived unit of inductance in the International System of Units (SI). Inductance is a property of electrical circuits that opposes any change in the current flowing through them - it essentially measures how effectively a conductor is able to store electrical energy when an electrical current is flowing through it.

1 petahenry (PH) is equivalent to 10^15 henries (H), where the henry is the base SI unit of inductance. The prefix "peta" symbolizes a factor of 10^15 (1,000,000,000,000,000) times the base unit. Hence, the petahenry represents an extremely large level of inductance, and it is mainly used in the scientific and engineering fields as a convenient way to express very high inductance values.

To put it into context, practical applications with inductance in the petahenry range are exceedingly rare, as most inductors commonly used in everyday electronics and electrical devices are in the range of microhenries (μH) to millihenries (mH).