電磁學平時考1

(10%)1 .What are the base vectors 、metric coefficient、differential volume of three orthogonal coordinate systems?

(10%)2.What is the define ▽V in general orthogonal coordinates?

(10%)3.What is the define of  ▽•A in general orthogonal coordinates?

(10%)4.英翻中:We define the vector that represents both the magnitude and the direction of the maximum space rate of a scalar as the gradient of that scalar.

(l0%)5.What is the mathematical define of Gauss law in free space?

(10%)6.What is the mathematical define of the divergence of A?

(10%)7. What is the divergence theorem?

 (30%)8. A 2C point charge is located at the origin , and a second point charge of -5C is located on the x axis at the poison(50 ,0)cm.How much work is required to bring a 10C point charge from infinity to the point(0 ,40)cm.