The numeriecal value of ionization in eV equals the inoization potential in volts .Does the equally hold if thesequantities are inasured in some other units?

The value of stopping potential when the frequency of light is equal to the threshold frequency is

Explain the following, give appropriate reasons. (i) Ionization potential of N is greater than that of O (ii) First ionization potential of C-atom is greater than that of B-atom, where as the reverse is true for second ionization potential. (iii) The electron affinity values of Be and Mg are almost zero and those of N (0.02 eV) and P (0.80 eV) are very low (iv) The formation of F^(-) . (g) from F(g) is exothermie while that of O^(2-) (g) from O (g) is endothermic.

Suppose the energy of a hydrogen- like atom is given as E_(n) = (-54.4)/(n^(2))eV where ninN . Calculate the following: (a) Sketch the energy levels for this atom and compute its atomic number. (b) If the atom is in ground state, compute its first excitation potential and also its ionization potential. (c) When a photon with energy 42 eV and another photon with energy 56 eV are made to collide with this atom, does this atom absorb these photons? (d) Determine the radius of its first Bohr orbit. (e) Calculate the kinetic and potential energies in the ground state.

Show that for a particle executing simple harmonic motion a. the average value of kinetic energy is equal to the average value of potential energy. b. average potential energy = average kinetic energy =1/2 (total energy) (Hint : average kinetic energy = =1/Tint_(0)^(T) (Kinetic energy) dt and average Potential energy = =1/Tint_(0)^(T) (potential energy) dt

Figure shows two vessels with adiabatic walls, one containing 0.1 g of helium (gamma =1.67 , M = 4 g mol^(-1)) and the other containing some amount of hydrogen (gamma = 1.4, M = 2 g mol^(-1)) . Initially , the temperatures of the two gases are equal. The gases electrically heated for some time during which equal amounts of heat are given to the gases. It is found that the temperatures rise through the same amount in the two vessels. Calculate the mass of hydrogen.

A parallel plate capacitor is charged by a battery after some time, the battery is disconnected and a dielectric slab with its thicnkess equal to the plate so reparation is insected between the plates. How will (i) the capacitance of the capacitor (ii) potential difference between the plates & (iii) the energy sotred in the capacitor the affected ? Q_(0) -charge V_(0) - potential difference, C_(0) - capacitance, E_(0) electric field. U_(0) - energy spred, before the dielectric slab is inserted. Q_(0)=C_(0) V_(0), (V_(0))/(d), U_(0)=(1)/(2)C_(0)V_(0)^(2)?

You are given a solenoid of length 'l', number of turns per unit length 'n' and area of cross-section A. When a current 'I' passes through it, a. What is the total magnetic flux through the solenoid? b. What is the self inductance of the solenoid? c. How does the value of self inductance get affected if some material of high relative permeability is filled inside the solenoid?

Two ions have equal masses but one is singly- ionized and the other is doubly- ionized. They are pojected from the same place in a uniform magnetic field with the same velocity perpendicular to the field.