What is the resistance of a 4 to 20 mA loop if a transmitter is drawing 10 mA and the loop voltage is 24 VDC?
A. 2400 ohms
B. 1200 ohms
C. 800 ohms
D. 600 ohms
Answer:B
What is the resistance of a 4 to 20 mA loop if a transmitter is drawing 10 mA and the loop voltage is 24 VDC?
A. 2400 ohms B. 1200 ohms C. 800 ohms D. 600 ohms
Explanation: The resistance of a 4 to 20 mA loop can be calculated using Ohm’s law and the measured current and voltage. Plugging in the values gives R = V / I = 24 V / 10 mA = 2400 ohms.