In Bohr's model of hydrogen atom, let PE represent potential energy and TE the total energy. In going to a higher orbit,
A ball of mass 10 g is dropped from a certain height. At 50m height its KE is equal to its PE. From what height was it dropped? Calculate its PE at the topmost point, TE midway.
If a point charge is taken from lower potential to higher potential then PE increased or decreased?