When liquid medicine of density rho is to be put in the eye, it is done with the help of a dropper. As the bulb on the top of the dropper is pressed, a drop forms at the opening. We first assume that the drop formed at the opening is spherical because that requires in its surface energy . To determine the size, we calculate the net verticle force due to the surface tension T when the radius of the drop is R. when the force becomes smaller than weight of the drop, the drop gets detached from the dropper. ii. If r=5xx10^-4m, rho=10^3 kg. m^-3, g=10m.s^-2, T = 0.11 N. m^-1 the radius of the drop when it detaches from the dropper is approximately

When liquid medicine of density rho is to be put in the eye, it is don

1.	When liquid medicine of density rho is to be put in the eye, it is done with the help of a dropper. As the bulb on the top of the dropper is pressed, a drop forms at the opening. We first assume that the drop formed at the opening is spherical because that requires in its surface energy . To determine the size, we calculate the net verticle force due to the surface tension T when the radius of the drop is R. when the force becomes smaller than weight of the drop, the drop gets detached from the dropper. ii. If r=5xx10^-4m, rho=10^3 kg. m^-3, g=10m.s^-2, T = 0.11 N. m^-1 the radius of the drop when it detaches from the dropper is approximately
Answer» `.14xx10^-3` m `3.3xx10^-3 ` m `2.0xx10^-3 m` `4.1 xx10^-3 ` m Answer :A