Derivation of rise of liquid and fall of liquid in capillary tube ( PU 2015)/ fluid mechanics

Hello friends today I am going to teach you a derivation of rise and fall of liquid in capillary tube which was asked in 2015 in Bachelor in civil engineering third semester exam of purbanchal university.In this video I have given a concept how surface tension and how weight of liquid act and how the weight of liquid is equal to force due to surface tension.