00:01
Hi guys, now in this problem we need to find out the potential energy, electric potential energy for the three charge system.
00:10
Now electric potential energy is given as if you have a two charge, so electric potential is equal to what? that is, this is we have a q1 and we have a q2 charge.
00:22
So electric potential energy of these two charge system is equal to what? this is kq1, q2, divide by r.
00:31
This distance are.
00:35
Potential energy between these two charges and this charge should be plug in with what sign so i can say that the potential energy of this system is well to what first we need to consider these two charges then we need to consider these two charges okay and then we need to consider these two charges okay now see this is k q1 q2 which is what this will be what minus 50 times 20, divide by this distance which is 4.
01:23
So this is 4.
01:25
Plus one thing is also keep in mind that these are in microculum.
01:29
So this should be multiplied with what 10 to the power minus 6 times 10 to the power minus 6 which is what 10 to the power 12.
01:36
Plus again this is what k times.
01:40
Consider these two charges minus 15 times...