Advanced Qualification · A-001 Advanced theory · A-001-002-011
Energy is stored within an inductor that is carrying a current. The amount of energy depends on this current, but it also depends on a property of the inductor. This property has the following unit:
- A farad
- B watt
- C henry
- D coulomb
Correct answer: C — henry. From the official ISED question bank, verified word for word.
Why
The energy stored in an inductor depends on its inductance, which measures how well the component creates a magnetic field from electric current. The full explanation — and one for every question — is in Pro.
Practise this section
Advanced theory: time constants, reactance, impedance, resonance, Q, and the mathematics behind tuned circuits.