How is voltage drop calculated for a feeder feeding a motor load, and what factors affect it?

How is voltage drop calculated for a feeder feeding a motor load, and what factors affect it?

• A. V_drop ≈ I × Z_total; factors include current, conductor size, length, temperature, and configuration
• B. V_drop ≈ I × Z_total × length; factors include current, conductor size, length, temperature, and configuration
• C. V_drop = I × R only; factors include current and resistance
• D. Voltage drop is constant and independent of current and impedance

Answer: (B)