PhysRefPhysics reference
Electricity & Magnetism
E=−LdIdt\mathcal{E} = -L\frac{dI}{dt}

EMF induced by changing current in same circuit.

Variables

ε
Induced EMF
Self-induced EMF
V
L
Inductance
Self-inductance
H
dI/dt
Current rate
Rate of current change
A/s

Derivation

ε = -dΦ/dt = -L(dI/dt) where Φ = LI.

Your notes

0/5000

Common questions

What is the Self-Inductance formula?

Self-Inductance is written mathcal{E} = -LdI/dt. EMF induced by changing current in same circuit. It belongs to Electricity & Magnetism, under Electromagnetic Induction.

What are the units in mathcal{E} = -LdI/dt?

In SI units, ε is induced emf, measured in kg·m²/(A·s³); L is inductance, measured in kg·m²/(A²·s²); dI/dt is current rate, measured in A/s.

How is the Self-Inductance formula derived?

ε = -dΦ/dt = -L(dI/dt) where Φ = LI. The result is mathcal{E} = -LdI/dt.