Trong không khí, đặt hai điện tích q1 = 4.10- 8
(C) và q2 = - 3.10- 8
(C) tại 2 điểm A, B cá...
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Trong không khí, đặt hai điện tích q1 = 4.10- 8
(C) và q2 = - 3.10- 8
(C) tại 2 điểm A, B cách nhau
30cm và điện tích q = 10- 8
(C) đặt tại M. Tính độ lớn lực tĩnh điện tổng hợp do q1 ,q2 sinh ra tác dụng lên
q trong các trường hợp sau :
a) M là trung điểm cuả AB
b). MA = 40cm, MB = 10cm.
c) Tam giác AMB vuông cân, góc M vuông.
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