Awoodda korantada ee koontaroolaha kubadda - dhibaatooyinka iyo xalalka
1. Kontaroolaha kubbadda godan ee 4-μC wuxuu leeyahay gacan 8-cm ah. Go'aami awoodda korantada ee dusha sare ee kubadda. (k = 9.10 9 Nm 2 .C -2 )
La yaqaan:
The kharash koronto (Q) = 4 μC = 4 x 10-6 C 
Gacanka kubbadda (r) = 8 cm = 8 x 10 -2 m
Joogtada Coulomb (k) = 9.10 9 Nm 2 .C -2
La Doonayo: Awoodda korantada ee ku taal dusha sare ee kubadda (V)

Go'aami booska antinode-ka 5aad laga bilaabo dhammaadka go'an.

