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

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

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

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