The screened nuclear charge of a neutral Helium atom is given as 1.7e, where e is the magnitude of the electronic charge. Assuming the Bohr model of the atom for which the energy levels are En = -Z22 × 1n2 atomic units (where Z is the effective atomic number), the first ionization potential of Helium in atomic units is:

Which Indian independence movement leader was primarily known for his philosophy and practice of non-violent civil disobedience?

Who gave the call for 'Do or Die' during the Quit India Movement in 1942?

Which of the following revolutionary pairs were imprisoned together in Cellular Jail and faced harsh conditions, contributing significantly to the Indian independence movement?