A 0 to 150 V voltmeter has an error of ±2% of full-scale deflection. What is the range of readings if true voltage is 50 V?
- A. 40 V – 50 V
- B. 47 V – 53 V
- C. 0 V – 53 V
- D. 0 V – 51 V
Answer: B. 47 V – 53 V
Explanation: Full scale error = ±2% of 150 V = ±3 V. For a measured value of 50 V, true voltage range is 50 ± 3 V = 47 V – 53 V.