0:00
Sub -a.
00:02
Let q1 be the charge minus 3 .0 microcolum which is kept on the x -axis.
00:11
And q2 is the charge which is minus 5 .0 microcolum which is kept on the y -axis.
00:20
Q3 be the charge plus 2 .0 microcolum which is kept on the negative x -axis.
00:29
All three charges q1, q2 and q3, are equidistant from the origin.
00:43
And the distance to the origin are as given to be 8 .60 centimetre which can also be written as 8 .60 into 10 to the power of minus 2 meter.
00:57
We know that electric field points towards the negative charge, whereas it points away from the positive charge, and hence the net electric field at the origin can be written as the column constant k times the magnitude of charge q1 divided by r square x cap plus.
01:29
K multiplied by magnitude of q2 divided by r square y cap plus k into the magnitude of q3 divided by r square x cap.
01:45
On simplifying, we get k over r square the whole multiplied by the magnitude of q1 plus q3 x cap plus magnitude of q2 y cap.
02:02
From this we can say that the magnitude of the net electric field at the origin is k over r square the whole multiplied by q1 plus q3 the whole square plus q2 the whole square the whole raised to the power of 1 by 2...