When the galvanometer reads zero the circuit is in the null - balance position.當(dāng)檢流計(jì)的讀數(shù)為零時(shí),電路處于零平衡位置.If a sinusoidal current is sent through a movingcoil galvanometer, the meter reads zero.如果將一正弦電流通入動(dòng)圈式電流計(jì), 那么這電流計(jì)的讀數(shù)為零.Th...