142159 Emission of electrons in photoelectric effect is possible if

142161 A beam of charged particles of charge $q$ and mass $m$ are accelerated from rest through a potential difference of $100 \mathrm{~V}$. They pass through crossed electric and magnetic fields which together produce null deflection. If these electronic and magnetic fields are respectively $15 \times 10^{3} \mathrm{Vm}^{-1}$ and $5 \mathrm{Wbm}^{-2}$ then $\mathrm{q} / \mathrm{m}$ has a value, in $\mathrm{C} \mathrm{kg}^{-1}$, equal to

142162 Two photons of energies twice and thrice the work function of a metal are incident on the metal surface. Then, the ratio of maximum velocities of the photoelectrons emitted in the two cases respectively, is

142163 Consider the two following statements $A$ and $B$, and identify the correct choice given in the answer.

142164 In an experiment on photoelectric emission from a metallic surface, wavelength of incident light is $2 \times 10^{-7} \mathrm{~m}$ and stopping potential is 2.5 V. The threshold frequency of the metal (in $\mathrm{Hz}$ ) approximately
(Charge of electron, $\mathrm{e}=1.6 \times 10^{-19} \mathrm{C}$, Planck's constant, $h=6.6 \times 10^{-34} \mathrm{~J}-\mathrm{s}$ )

142159 Emission of electrons in photoelectric effect is possible if

142161 A beam of charged particles of charge $q$ and mass $m$ are accelerated from rest through a potential difference of $100 \mathrm{~V}$. They pass through crossed electric and magnetic fields which together produce null deflection. If these electronic and magnetic fields are respectively $15 \times 10^{3} \mathrm{Vm}^{-1}$ and $5 \mathrm{Wbm}^{-2}$ then $\mathrm{q} / \mathrm{m}$ has a value, in $\mathrm{C} \mathrm{kg}^{-1}$, equal to

142162 Two photons of energies twice and thrice the work function of a metal are incident on the metal surface. Then, the ratio of maximum velocities of the photoelectrons emitted in the two cases respectively, is

142163 Consider the two following statements $A$ and $B$, and identify the correct choice given in the answer.

142164 In an experiment on photoelectric emission from a metallic surface, wavelength of incident light is $2 \times 10^{-7} \mathrm{~m}$ and stopping potential is 2.5 V. The threshold frequency of the metal (in $\mathrm{Hz}$ ) approximately
(Charge of electron, $\mathrm{e}=1.6 \times 10^{-19} \mathrm{C}$, Planck's constant, $h=6.6 \times 10^{-34} \mathrm{~J}-\mathrm{s}$ )

142159 Emission of electrons in photoelectric effect is possible if

142161 A beam of charged particles of charge $q$ and mass $m$ are accelerated from rest through a potential difference of $100 \mathrm{~V}$. They pass through crossed electric and magnetic fields which together produce null deflection. If these electronic and magnetic fields are respectively $15 \times 10^{3} \mathrm{Vm}^{-1}$ and $5 \mathrm{Wbm}^{-2}$ then $\mathrm{q} / \mathrm{m}$ has a value, in $\mathrm{C} \mathrm{kg}^{-1}$, equal to

142162 Two photons of energies twice and thrice the work function of a metal are incident on the metal surface. Then, the ratio of maximum velocities of the photoelectrons emitted in the two cases respectively, is

142163 Consider the two following statements $A$ and $B$, and identify the correct choice given in the answer.

142164 In an experiment on photoelectric emission from a metallic surface, wavelength of incident light is $2 \times 10^{-7} \mathrm{~m}$ and stopping potential is 2.5 V. The threshold frequency of the metal (in $\mathrm{Hz}$ ) approximately
(Charge of electron, $\mathrm{e}=1.6 \times 10^{-19} \mathrm{C}$, Planck's constant, $h=6.6 \times 10^{-34} \mathrm{~J}-\mathrm{s}$ )

142159 Emission of electrons in photoelectric effect is possible if

142161 A beam of charged particles of charge $q$ and mass $m$ are accelerated from rest through a potential difference of $100 \mathrm{~V}$. They pass through crossed electric and magnetic fields which together produce null deflection. If these electronic and magnetic fields are respectively $15 \times 10^{3} \mathrm{Vm}^{-1}$ and $5 \mathrm{Wbm}^{-2}$ then $\mathrm{q} / \mathrm{m}$ has a value, in $\mathrm{C} \mathrm{kg}^{-1}$, equal to

142162 Two photons of energies twice and thrice the work function of a metal are incident on the metal surface. Then, the ratio of maximum velocities of the photoelectrons emitted in the two cases respectively, is

142163 Consider the two following statements $A$ and $B$, and identify the correct choice given in the answer.

142164 In an experiment on photoelectric emission from a metallic surface, wavelength of incident light is $2 \times 10^{-7} \mathrm{~m}$ and stopping potential is 2.5 V. The threshold frequency of the metal (in $\mathrm{Hz}$ ) approximately
(Charge of electron, $\mathrm{e}=1.6 \times 10^{-19} \mathrm{C}$, Planck's constant, $h=6.6 \times 10^{-34} \mathrm{~J}-\mathrm{s}$ )

142159 Emission of electrons in photoelectric effect is possible if

142161 A beam of charged particles of charge $q$ and mass $m$ are accelerated from rest through a potential difference of $100 \mathrm{~V}$. They pass through crossed electric and magnetic fields which together produce null deflection. If these electronic and magnetic fields are respectively $15 \times 10^{3} \mathrm{Vm}^{-1}$ and $5 \mathrm{Wbm}^{-2}$ then $\mathrm{q} / \mathrm{m}$ has a value, in $\mathrm{C} \mathrm{kg}^{-1}$, equal to

142162 Two photons of energies twice and thrice the work function of a metal are incident on the metal surface. Then, the ratio of maximum velocities of the photoelectrons emitted in the two cases respectively, is

142163 Consider the two following statements $A$ and $B$, and identify the correct choice given in the answer.

142164 In an experiment on photoelectric emission from a metallic surface, wavelength of incident light is $2 \times 10^{-7} \mathrm{~m}$ and stopping potential is 2.5 V. The threshold frequency of the metal (in $\mathrm{Hz}$ ) approximately
(Charge of electron, $\mathrm{e}=1.6 \times 10^{-19} \mathrm{C}$, Planck's constant, $h=6.6 \times 10^{-34} \mathrm{~J}-\mathrm{s}$ )