Two protons, each of charge #+1.60 * 10-19 C#, are #2.00 * 10-5 m# apart. What is the change in the electric potential energy of this pair of charges if they are brought #1.00 * 10-5 m# closer together?
Answer is A, why?
A) 1.15 10-23J
B) 3.20 10-19J
C) 3.20 10-16J
D) 1.60 10-19J
E) 1.60 * 10-14J
Answer is A, why?
A) 1.15 10-23J
B) 3.20 10-19J
C) 3.20 10-16J
D) 1.60 10-19J
E) 1.60 * 10-14J
1 Answer
Mar 15, 2018
Initial electrostatic potential energy was
When they were brought closer by
So,new potential energy is
So,change in potential energy =
Note here we get increase in potential energy during this process as bringing two positively charge results in repulsion,which causes the system to gain potential energy.