Arihant Physics by D.C Pandey

Magnetic moment due to the motion of the electron in n^th energy of hydrogen atom is proportional to. Magnetic moment due to the motion of the electron in n^th energy of hydrogen atom is proportional to. September 4, 2021 Category: Arihant Physics by D.C Pandey ,

The number of alpha and beta- emitted during the radioactive decay chain starting from ._(226)(88) Ra and ending at ._(206)(82) Pb is The number of alpha and beta- emitted during the radioactive decay chain starting from ._(226)(88) Ra and ending at ._(206)(82) Pb is September 4, 2021 Category: Arihant Physics by D.C Pandey ,

The wavelength of the K_(alpha) line for an element of atomic number 57 is lambda . What is the wavelength of the K_(alpha) line for the element of atomic number 29 ? The wavelength of the K_(alpha) line for an element of atomic number 57 is lambda . What is the wavelength of the K_(alpha) [...]

There are two radioactive substances A and B. Decay constant of B is two times that of A. Initially, both have equal number of nuclei. After n half lives of A, rate of disintegration of both are equal. The value of n is both have equal number of nuclei. After n half-lives of A rate [...]

If 92U^238 changes to 85 ​At^210 by a series α and β decays, the number of α and β decays undergone is If 92U^238 changes to 85 ​At^210 by a series α and β decays the number of α and β decays undergone is September 4, 2021 Category: Arihant Physics by D.C Pandey ,

Number of nuclei of a radioactive substance at time t = 0 are 1000 and 900 at time t = 2s. What will be the number of nuclei at time t = 4s? Number of nuclei of a radioactive substance at time t = 0 are 1000 and 900 at time t = 2s. What [...]

The activity of a sample reduces from A0 to A0/√(3) in one hour. The activity after 3 hours more will be. The activity of a sample reduces from A0 to A0/√(3) in one hour. The activity after 3 hours more will be. September 4, 2021 Category: Arihant Physics by D.C Pandey ,

Photons with energy 5 eV are incident on a cathode C in a photoelectric cell. The maximum energy of emitted photoelectrons is 2 eV. When photons of energy 6 eV are incident on C, no photoelectrons will reach the anode A, if the stopping potential of A relative to C is if the stopping potential [...]

Cut off potential for a metal in photoelectric effect for light of wavelength lambda_(1), lambda_(2) and lambda_(3) is found to be V_(1),V_(2) and V_(3) volts , If V_(1),V_(2) and V_(3 are in Arithmetic progression then lambda_(1),lambda_(2) and lambda_(3) will be in Cut off potential for a metal in photoelectric effect for light of wavelength lambda_(1) [...]

Radiations of two photon energies twice and five times the work function of metal are incident successively on the metal surface. The ratio of the maximum velocity of the photoelectrons emitted in the two cases will be The graph of ln(R/R0 ) versus ln A (R=radius of a nucleus and A = its mass number) [...]