- #1

hokhani

- 488

- 8

[itex]\rho (x)=\frac{A\delta(z)\Theta (a-\rho)}{\rho}[/itex] (A is constant that sholud be determined and [itex]\theta [/itex]is step function), we get [itex]A=\frac{Q}{2\pi a} [/itex] and so:

[itex]\rho (x)=\frac{\frac{Q}{2\pi a}\delta(z)\Theta (a-\rho)}{\rho}[/itex]

But we know that the correct one is:

[itex]\rho (x)=Q\frac{\delta(z)\Theta (a-\rho)}{2\pi a^2}[/itex].

Could anyone please tell me what is my mistake?