please explain in detail 13 Five charges are arranged in a r

please explain in detail

13. Five charges are arranged in a regular pentagon with side length d 15 cm. at the top the top and qa, q3, quand as are arranged in a clockwise manner, what is the magnitude an direction of the electric field at the center of the pentagon if q1 3q, q2 -3q,qs 3q.qa 3q, where q 20 nc?

Solution

the total five charges are placed symmetrically with respect to the

charge placed at centre of the pentagon. therefore, effectively zero

electric force is acting on the particle. hence, the net electric field at

the center of the pentagon is zero.