00:01
All right, so in this problem, so we have a vertical sheet with charge density equals sigma, and we have a fiber string attached with an electric charge.
00:19
So the mass of the charge is m and the charge is q.
00:25
This is a positive and the sigma is also positive.
00:29
So basically there is a repulsive, interaction between this ball and this sheet.
00:37
So basically, if we look at this, the free body diagram of this ball, we see that there is a gravity and there is an electric static force which is pointing to the left because the both contain positive charge and there is also the force on the strain.
01:00
So for the electric field induced by the sheet, it actually equal to e equal sigma over 2 epsilon knots.
01:18
So for the uniform distributed charge, it is sigma.
01:26
So basically the electric field equals sigma over 2 epsilon not...