Answer: Rectifier.
- A Transformer
- B Inductor
- C Rectifier
- D Generator
Correct answer: C. Rectifier
Explanation: A rectifier (using diodes) converts AC to DC by allowing current in only one direction.
In a pure inductor the current lags the voltage by 90° (energy is briefly stored in the magnetic field before current responds); in a pure capacitor the current leads the voltage by 90° (current must flow to build up charge before voltage rises) - the mnemonic "ELI the ICE man" keeps these straight.
Concept context
AC circuits, impedance, LCR series circuit, resonance, transformers, and power factor.