What is the effect of decreasing the loop impedance in a 4 to 20 mA loop?
A. Increases loop voltage
B. Decreases loop voltage
C. Increases loop current
D. Decreases loop current
Answer:C
What is the effect of decreasing the loop impedance in a 4 to 20 mA loop?
A. Increases loop voltage B. Decreases loop voltage C. Increases loop current D. Decreases loop current
Explanation: Decreasing the loop impedance in a 4 to 20 mA loop increases the loop current. This is because the transmitter is designed to provide a fixed current output, and the loop impedance determines the voltage drop across the load. As the loop impedance decreases, the voltage drop decreases, which increases the loop current.