1) Ba diem A,B,C tao thanh 1 tam giac vuong tai C, AC = 4cm, BC = 3cm va nam trong 1 dien truong deu. Vecto cuong do dien truong vecto E song song voi AC, huong tu A → C va co do lon E = 5000 V/m. Tinh:
a) UAC, UCB, UAB
b) Cong cua dien truong khi mot electron (e) di chuyen tu A den B