Topic explanation

Standard explanation

Self-inductance is the property of a circuit by which a changing current in that circuit produces an induced emf that opposes the change in current.

Key points

• henry (H)
• NΦ = LI
• ε=−L(di/dt)
• L=NΦ/I
• Unit: A current in a coil produces magnetic flux. If the current changes, magnetic flux linked with the c
• Flux-Linkage Form: For `N` turns: NΦ = LI under linear conditions.
• A changing current induces an opposing emf in the same circuit.

Labelled diagram