§x2.1 导体中的电场和电流 电动势（Electric potential, electric field and current in the conductor x2.1）.docVIP

§x2.1 导体中的电场和电流 电动势（Electric potential, electric field and current in the conductor x2.1） This article is contributed by hylihan DOC documents may experience poor browsing on the WAP side. It is recommended that you first select TXT, or download the source file to the local view. The X 2.1 conductor in the electric field and current [learning goal] EMF Sui Xiugang, a Ma Hongsen in Yucheng 1, make clear the role of the power supply in the DC circuit, understand the establishment of the constant electric field in the conductor, know the concept of constant current and describe the physical quantity of the current strength - current. 2, let the students know the non static electricity in the circuit is the role of the positive charge from the negative to the positive handling, at the same time in the process of non static electricity will work, other forms of energy into electrical energy, understanding of the concept of electromotive force. [autonomous learning] 1, respectively, with positive and negative charge of A, B two conductors, if using wire R connection, the conductor R may exist a current, if to maintain a continuous current, A and B need to maintain a certain. The device A and B maintain a certain potential difference is called. 2, when reaching the steady state, the electric field in conductor is made, the accumulated charge circuit elements formed, the charge distribution is, the distribution of the electric field is the electric field, and keep the wire and wire. 3, a stable distribution generated by stable, known as a constant electric field. The electrostatic field of the electric potential, potential and electric field intensity between the application in a constant electric field. 4. We call a constant current that does not change with time. 5, I represents the current, and Q represents the amount of charge through the cross section of the conductor in time t. The relation between them is:. 6, in the external circuit, the positive charge from the pow