4. e The energy required to move a satellite of mass m from an orbit of radius 2R to 3R around earth - of mass M is GMm 1. 12R GMm 2. R GMm 3. BR GMm 4. 2R neetprep Physics 20 Questions Cont 1. 4. An electron revolves round a nucleus of charge Th Ze. In m order to excite the electron from the state n=3 to of n=4, the energy required is 66.0 eV. Z will be 1. 1. 25 2. 2. 10 3.4 3. 4. 5 4. 2.