1. A pair of equal point charges of Q 2.10-⁹ "Care separated by a distance
0.30 m. As shown in the figure the two charges
and a point I are at the corners of an equilat-
cral triangle, and a point B is the midpoint of
the two charges. Let the proportionality con-
stant of Coulomb's law (Coulomb's constant)
be 9.0_10⁹ N/?. You can use √2-1.41,
√3_1.73 and √5 2.24 if you need. Round
off your answers to two significant figures.
B В
0.30 m
Q
(1) Determine the magnitude of the electric field at the point
N/C
(2) Calculate the electric potential difference between the points 1 and B
(21
(3) A partide of electric charge q = -3.0 x 10 Cat the point 4 starts from rest.
Calculate the kinetic energy of the particle when it passes the point B.
J​