摘要
当具有磁性的物体靠近或远离闭合线圈时,由于线圈中磁通量的变化,在其内部会产生感生脉冲信号,借助数字存储示波器实时采集该脉冲信号.分析该信号的时间间隔即可获得物体下落的时间,从而计算出重力加速度以及验证物体自由落体的运动规律.
When object with a magnetic is close to or away from the coil, pulse signal is induced in the coil due to the variation of magnetic flux. Digital storage oscilloscope is used to collect the pulse signal. The falling time of object can be obtained by analyzing the number of intervals of pulse signals. Thus, the value of acceleration of gravity can be gained and the motion law of free fall is verified.
出处
《大学物理》
北大核心
2013年第2期40-42,共3页
College Physics
关键词
数字存储示波器
感生脉冲信号
重力加速度
自由落体
digital storage oscilloscope
induced pulse signal
acceleration of gravity
free fall
