A boy of mass 30 Kg is sitting at a distance of 2 m from the middle of a see-saw, where should a boy
Solution Let the 40 Kg boy sits at a distance of X m from the middle of the see-saw, According to the Principle of Moment Anti Clockwise...
Two bulbs are marked 100 W, 220V and 60 W, 110V. Calculate the ratio of their resistance.
Solution : R1 : R2 = 12 : 5 #Electricity
