00:01
Hello everyone, there are four identical charges.
00:03
So we are considered all charges q1, q2, q3 and the q4.
00:10
So we are considered just a q and having that value is a plus 50 microcrum.
00:16
Okay.
00:17
If all the particles are placed in the corners of a square, so this is the square, okay, and we are placed every corner, this is a q, q and q and a, and a, cube okay and side is also given a this is the two meter every side how much external energy is required to bring another charge of a plus you know from the infinity the center okay in that center if you want to there is a infinity and please a charge at the center from the infinity so how much work is done so students first of all we calculate a potential at the center of so we center due to a single chart if this is the distance so first of all we calculate distance and this is the distance so this is the distance is a two and that distance is a given a two guys okay so just compare with the given data now so these distance are two and two so first of all hypotenous becomes a this is the hypotenrued of four guys because two square and two squared becomes a eight four and two four becomes eight so these hypoteness so we can write here this root square 4 plus 4 becomes a 2 root 2 okay if this is the complete distance so we want to require only half so divided by 2 so only a root 2 only a root 2 is the distance at the center student okay now we will calculate a center there are a point how many charges 4 so what is the distance 4 multiply by a k into q divided by a r square r only are students.
01:59
Okay, this is a distance.
02:00
Now, so the potential 4 into a 9 into 10 to the power 9, multiply a charge value 50 into a 10 to the power minus 6 and divided by a, this is becomes a students only a root 2...