Hình trên minh họa đường sức điện và các mặt đẳng thế gây bởi hai điện tích điểm . Kết luận nào sau đây là đúng khi nói về điện thế tại các điểm A , B , C ? A. VA > VB > Vc .
B. VA < VB < Vc .
C. VA = VB = Vc .
D. VA = Vc < VB

Two point charges are separated by a certain distance. how does the strength of the electric field produced by the first charge, at the position of the second charge, change if the second charge is doubled? a. the field does not change b. the field strength decreases by half. c. the field strength doubles d. the field strength quadruples

Point charges q1=+2.00μc and q2=−2.00μc are placed at adjacent corners of a square for which the length of each side is 1.50 cm . point a is at the center of the square, and point b is at the empty corner closest to q2. take the electric potential to be zero at a distance far from both charges. part a what is the electric potential at point a due to q1 and q2? express your answer with the appropriate units.

How can you measure the amplitude of a longitudinal wave?