بار
type: Concept
preferred label: charge @en
related: بار آزاد

بار آزاد
type: Concept
broader: الکتروستاتیک
preferred label: free charge @en
related: بار
related: رسانا

رسانا
type: Concept
preferred label: conductor @en
related: بار آزاد

الکتروستاتیک
type: Concept
narrower: بار آزاد
preferred label: electrostatics @en