✔ 最佳答案
安培計 = amperemeter
伏特計 = voltmeter
rms value = root-mean-square value 均方根值,有効值
peak value = 峰值
交流電既學問,直流電無關
rms value = peak value x 0.707
peak value = rms value x 1.414 = rms / 0.707
我地普通用既係 RMS value,peak value 既較難買,應該叫真空管電壓計
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