142599 Find the minimum wavelength of \(X\)-rays emitted by \(\mathrm{X}\)-ray tube, which is operating at a accelerating voltage of \(15 \mathrm{kV}\).

142600 X-rays are incident on a target metal atom having 30 neutrons. The ratio of atomic radius of the target atm and \({ }_2^4 \mathrm{H}\) is \(14^{1 / 3}\). The atomic number of the target atom is:

142601 If the electron in hydrogen atom jumps from second Bohr orbit to ground state and difference between energies of the two states is radiated in the form of photons. If the work function of the material is \(4.2 \mathrm{eV}\) then stopping potential is
[Energy of electron in \(n^{\text {th }}\) orbit \(=-\frac{13.6}{n^2} \mathrm{eV}\) ]

142603 The amount of energy released when one microgram of matter is annihilated is

142599 Find the minimum wavelength of \(X\)-rays emitted by \(\mathrm{X}\)-ray tube, which is operating at a accelerating voltage of \(15 \mathrm{kV}\).

142600 X-rays are incident on a target metal atom having 30 neutrons. The ratio of atomic radius of the target atm and \({ }_2^4 \mathrm{H}\) is \(14^{1 / 3}\). The atomic number of the target atom is:

142601 If the electron in hydrogen atom jumps from second Bohr orbit to ground state and difference between energies of the two states is radiated in the form of photons. If the work function of the material is \(4.2 \mathrm{eV}\) then stopping potential is
[Energy of electron in \(n^{\text {th }}\) orbit \(=-\frac{13.6}{n^2} \mathrm{eV}\) ]

142603 The amount of energy released when one microgram of matter is annihilated is

142599 Find the minimum wavelength of \(X\)-rays emitted by \(\mathrm{X}\)-ray tube, which is operating at a accelerating voltage of \(15 \mathrm{kV}\).

142600 X-rays are incident on a target metal atom having 30 neutrons. The ratio of atomic radius of the target atm and \({ }_2^4 \mathrm{H}\) is \(14^{1 / 3}\). The atomic number of the target atom is:

142601 If the electron in hydrogen atom jumps from second Bohr orbit to ground state and difference between energies of the two states is radiated in the form of photons. If the work function of the material is \(4.2 \mathrm{eV}\) then stopping potential is
[Energy of electron in \(n^{\text {th }}\) orbit \(=-\frac{13.6}{n^2} \mathrm{eV}\) ]

142603 The amount of energy released when one microgram of matter is annihilated is

142599 Find the minimum wavelength of \(X\)-rays emitted by \(\mathrm{X}\)-ray tube, which is operating at a accelerating voltage of \(15 \mathrm{kV}\).

142600 X-rays are incident on a target metal atom having 30 neutrons. The ratio of atomic radius of the target atm and \({ }_2^4 \mathrm{H}\) is \(14^{1 / 3}\). The atomic number of the target atom is:

142601 If the electron in hydrogen atom jumps from second Bohr orbit to ground state and difference between energies of the two states is radiated in the form of photons. If the work function of the material is \(4.2 \mathrm{eV}\) then stopping potential is
[Energy of electron in \(n^{\text {th }}\) orbit \(=-\frac{13.6}{n^2} \mathrm{eV}\) ]

142603 The amount of energy released when one microgram of matter is annihilated is