Answer: 1100 V.
- A 1100 V
- B 44 V
- C 220 V
- D 2200 V
Correct answer: A. 1100 V
Explanation: V<sub>2</sub>/V<sub>1</sub> = N<sub>2</sub>/N<sub>1</sub> = 1000/200 = 5. V<sub>2</sub> = 220 × 5 = 1100 V. This is a step-up transformer.
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.