Answer: Fewer turns than primary.
- A More turns than primary
- B Same turns as primary
- C Fewer turns than primary
- D More resistance
Correct answer: C. Fewer turns than primary
Explanation: Step-down transformer: Ns < Np. Output voltage Vs = Vp x (Ns/Np) < Vp.
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.