Questão sobre a lei de Ampere e Biot-Savart

Boa tarde meu professor passou essa questão de um livro indiano eu acho, eu resolvi e decidi compartilhar aqui com vocês.

A  questão é essa a seguir e a resposta esta no link:

Demonstrate the validity of the generalized form of Ampère’s law by showing that it gives the same result as the Biot–Savart law in a specified situation

Demonstrate the validity of the generalized form of Ampère’s law by showing that it gives the same result as the Biot–Savart law in a specified situation. shows two momentarily equal but opposite point charges (+Q and –Q) on the x axis at x = –a and x = +a, respectively. At the same instant there is a current I in the wire connecting them, as shown. Point P is on the y axis at y = R.

(a) Use the Biot–Savart law to show  that the magnitude of the magnetic field at point P is given by

Solução da Questão