One henry (H) is defined as the amount of inductance required to induce one volt (V) when the current changes at a rate of one ampere per second (A/s).
Inductance in henries can be calculated using $L = \frac{N\Phi}{I}$, where $L$ is inductance, $N$ is the number of turns, $\Phi$ is the magnetic flux, and $I$ is the current.
Mutual inductance between two coils can also be measured in henries.
The total inductance of series-connected inductors is the sum of their individual inductances ($L_{total} = L_1 + L_2 + ... + L_n$).
In parallel configurations, total inductance can be found using $\frac{1}{L_{total}} = \frac{1}{L_1} + \frac{1}{L_2} + ... + \frac{1}{L_n}$.
Review Questions
What does one henry (H) measure?
How do you calculate mutual inductance between two coils in terms of henries?
What formula would you use to find the total inductance of series-connected inductors?
Related terms
Inductance: Property of an electrical conductor by which a change in current induces an electromotive force.
Mutual Inductance: The measure of induction between two circuits or coils when the change in current in one induces a voltage in the other.
Magnetic Flux: $\Phi$, representing the quantity of magnetism, taking into account the strength and extent of a magnetic field.