Meters and troubleshootingQuestion 738 of 1506

A 250 Ω precision resistor is in series with a 4-20 mA loop. What is the voltage across it at 16 mA?

5 V
1 V
4 V
3.2 V

Show answer

Correct answer: 4 V

V = I × R = 0.016 A × 250 Ω = 4 V.

Source: Lessons in Electric Circuits I: DC (Kuphaldt), 9.3: Current Signal Systems

Questions last reviewed: 18 October 2026

Red Seal Electrician Practice needs JavaScript to run. Use its questions for practice. The real pass mark is usually 70%. Check it with your province or territory's apprenticeship office.