関連ワード:  define electrostatics class 12    what is electrostatics class 12    define current electricity class 12    define static electricity class 12    what is electrostatics class 12 notes    what is electrostatics class 12 physics    define electrostatic potential class 12    define electrostatic shielding class 12    define electrostatic induction class 12    define electrostatic shielding class 12 physics