Practice question

What is the formula for calculating voltage drop in a single-phase AC circuit?

  1. Vd = Power / Current
  2. Vd = (2 × L × I × R) / 1000, where L is one-way distance in feet, I is current in amps, and R is resistance per 1000 feet
  3. Vd = Voltage × Current
  4. Vd = Watts / Volts

Answer: B — Vd = (2 × L × I × R) / 1000, where L is one-way distance in feet, I is current in amps, and R is resistance per 1000 feet

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