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Vector Analysis

Quick practice

Question 1 of 5

Which one of the following equations expresses the equation of electromagnetic field in terms of electromagnetic potentials?

A

$\nabla^{2} \psi+\frac{\partial}{\partial t}(d i v \bar{Z})=-\frac{\rho}{\varepsilon}$

B

$\nabla^{2} \psi-\frac{\partial}{\partial t}(\operatorname{div} \bar{Z})=\frac{\rho}{\varepsilon}$

C

$\nabla^{2} \psi+\frac{\partial}{\partial t}(\operatorname{div} \bar{Z})=\frac{\rho}{\varepsilon}$

D

$\nabla^{2} \psi-\frac{\partial}{\partial t}(\operatorname{div} \bar{Z})=-\frac{\rho}{\varepsilon}$