What is a metaphasic plate?

What is a cell plate?

Write two application of colloid in the purification of drinking water and in photographic plates & film.

What is a meter bridge? What principle is used in it?

What are chiasmata? What is their significance?

In the above diagram, a particle of mass"m" and charge(-q) initially moving along X-axis with velocity "v". The length of the plave system is "L" and uniform electric filed between the plates is "E". What is the vertical deflext of the particle at the far edge of the plate?

What is a transformer? On what principle it is based?