共查询到19条相似文献,搜索用时 93 毫秒
1.
2.
3.
4.
5.
6.
7.
电磁感应和摆的共振是电磁学和力学两种相对独立的现象,该实验设计融电磁感应和共振现象于一身,使实验更具趣味性和科学性;通过实验把学生所学知识板块横向联系起来,培养学生的发散思维和用普遍联系的观点观察现象分析问题的能力. 相似文献
8.
9.
10.
11.
Summary The purpose of this paper is to cast light on various serious mistakes which have been involved during the analysis of two
experiments, related to the correctness of the Biot-Savart-Lorentz force law. At first in the MIT experiment, carried out
by Graneauet al., they claim that the calculated momentum, imparted to an electrodynamic-impulse pendulum, using the BSL force law, is 43%
larger than the experimentally measured momentum of the pi-frame pendulum. We have found that this discrepancy, using their
own data,is due to the use of a wrong value for the time constant parameter introduced in the current formula. In addition Pappas, like Graneau, although states that all the available energy is dissipated to Joule heating, considers
that all the pendulum momentum is imparted to field momentum yielding an enormous amount of field-radiated energy, which is
also completely wrong.
To speed up pubblication, the authors of this paper have agreed to not receive the proofs for correction. 相似文献
12.
介绍了电磁感应和超导基本理论的实际应用-磁悬浮列车。以日本超导磁悬浮列车为例,阐述其作用原理,介绍了超导磁悬列车的发展状况。指出在物理教学中,理论学习与实际应用相结合是提高学生学习兴趣和培养创新能力的有效途径。 相似文献
13.
14.
15.
16.
本文在电磁感应法的基础上,通过与亥姆霍兹线圈串联使电容达到谐振的改进方法,测量了不同电容参数下的亥姆霍兹线圈磁场分布,并利用Origin软件拟合分析了亥姆霍兹线圈磁场与中心轴线位置的关系.实验结果表明,基于电磁感应的改进方法测得的亥姆霍兹线圈磁场精确度在一定程度上均大于传统电磁感应法的测量结果,3种电容选择中,串联电容为0.099×10-6F时,精确度最高,拟合的亥姆霍兹线圈磁场与中心轴线位置的关系式与理论状态下的公式基本吻合.改进方法的实验效果明显,精确度高,科学可行,是一种值得推广的测量亥姆霍兹线圈磁场的改进方法. 相似文献
17.
18.