28 A U tube of uniform square cross sectional side a and

Last updated: 6/11/2023

28 A U tube of uniform square cross sectional side a and length of base L has a mercury in it Current I is passed between lower side of base to upper side of base of U tube A magnetic field B is applied across horizontal section perpendicular to the plane of U tube The difference in mercury levels is Given p density of mercury a L 3 BI 2BI B 2 pga pga A C BI pga D 4B1 pga