Question 11.SP.9: Alternating-current and voltage meters are always calibrated......
Alternating-current and voltage meters are always calibrated to read effective values. An ac voltmeter indicates that the voltage across a resistive load is 40 V. What is the peak voltage across this load?
Step-by-Step
From Table 11-1,
V_{M} = 1.414\ V (effective or rms value is understood for V)
= 1.414(40) = 56.6 V
| Table 11-1 Conversion Table for AC Sine Wave Voltage and Current | ||
| Multiply the Value
|
By
|
To Get the Value
|
| Peak | 2 | Peak-to-peak |
| Peak-to-peak | 0.5 | Peak |
| Peak | 0.637 | Average |
| Average | 1.570 | Peak |
| Peak | 0.707 | RMS (effective) |
| RMS (effective) | 1.414 | Peak |
| Average | 1.110 | RMS (effective) |
| RMS (effective) | 0.901 | Average |
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