基础实验题A:液体的表面张力系数测量

Fundamental test A:Measuring the surface tension coefficient of liquid

介绍了第5届全国大学生物理实验竞赛基础实验题A的实验内容,给出了参考解答,并分析了竞赛结果.基础实验题A涵盖毛细管法和最大泡压法测量液体的表面张力系数2部分,分5道试题.毛细管法和最大泡压法在理论上具有相似性,毛细管法从液体的表面张力系数的定义出发,引导学生从最基础的层面上理解液体表面张力系数的定义,从而自拟实验方案,自组实验器材进行实验测量;最大泡压法考查学生举一反三的学习能力,在相似的理论下自拟、自组实验.试题整体考查了学生对理论知识的理解运用能力以及基本的实验操作能力.

The content,solution and result analysis of the fundamental test A of the 5 th Chinese Undergraduate Physics Experiment Competition were given.The content was mainly about the measurement of surface tension coefficient of liquid using capillary method and maximum bubble pressure method.The two experimental methods were similar in theory.The capillary method guided students to understand the definition of surface tension coefficient from the most basic level,then they could draw up their own experimental scheme and carry out experimental measurements with self-organizing experiment device.The maximum bubble pressure method inspected students'extrapolation ability to adopt various flexible ways to deal with specific problems under the instruction of the similar theories.Overall,the competition examined students'ability to understand and apply theoretical knowledge,as well as the basic experimental operation ability.