The charged particle m only moves from point P to point Q under the action of electric field force. In this process, 2.6 × 10-6j work is done to overcome the electric field force A. The electric potential energy of m at P must be less than that at Q. B. the electric field strength at P must be less than that at Q. C. the electric potential at P may be higher than that at Q. D. the kinetic energy of m at P must be greater than that at Q

The charged particle m only moves from point P to point Q under the action of electric field force. In this process, 2.6 × 10-6j work is done to overcome the electric field force A. The electric potential energy of m at P must be less than that at Q. B. the electric field strength at P must be less than that at Q. C. the electric potential at P may be higher than that at Q. D. the kinetic energy of m at P must be greater than that at Q

A. It can be seen from the title that overcoming the electric field force to do work, that is, the electric field force does negative work, so the electric potential energy increases, and the electric potential energy at point P must be less than its electric potential energy at point Q, so a is correct; B. the distribution of electric field is unknown, so the relationship between the electric field strength at point P and point Q cannot be judged, so B is wrong; C. because the positive and negative charges are unknown, the electric potential at point P cannot be judged, that is, the electric potential at point P may be higher or lower Because of the electric potential at point Q, C is correct; D, because only the electric field force does work, there is only the conversion between the electric potential energy and the kinetic energy. If the electric potential energy increases, the kinetic energy decreases, so D is correct

1 1/2-5/6+7/12-9/20+11/30-13/42+15/56
"/" is the fraction line
The first one is 1 and 2 / 1-6 / 5 And so on
It's a simple operation

3/2-5/6+7/12-9/20+11/30-13/42+15/56
=1+1/2-1/2-1/3+1/3+1/4-1/4-1/5+1/5+1/6-1/7-1/8+1/8+1/9
=1+1/9
=10/9