00:01
Hi, here in this given problem, this is a square structure, square structure whose each side is given as a.
00:19
So the length of diagonal, it will be a root 2 using pythagoras theorem.
00:29
This is a positive charge at the top left corner, d, the same charge, positive charge, at the bottom right corner.
00:41
At the bottom left corner the charge c and at the top right corner this is a charge q charge here we have to find net charge net force experienced by this charge q provided charge b that is 4 .5 times of q and charge c this is 5 .5 times of q as each side is equal to a and all the charges are like means all are positive in nature.
01:22
So all the three charges b, c and b will be repelling this small q.
01:29
So force experienced by q due to this b kept at the top left corner, that is f at q due to b.
01:41
The force experienced by this cue due to the charge put at the bottom right corner that is also f at q due to b and due to diagonally opposite c the force is going like this f at q due to c okay these two forces f at q due to b these are same using cool arms law it will be given by k e electro -static constant k e multiplied by q1 means q into q2 means 4 .5 times of q divided by gap between them which is equal to the side of the square means a square so it is k e 4 .5 q squared divided by a square both of these forces making an angle of 45 degree over here and f at q due to c, using again colom's law, that is ke into q into 5 .5 times of q divided by a root 2 square...