142042 An isolated lead ball is charged upon continuous irradiation by EM radiation of wavelength, $\lambda=221 \mathrm{~nm}$. The maximum potential attained by the lead ball, if its work function is $4.14 \mathrm{eV}$ is (take, $\mathrm{h}=6.63 \times 10^{-34} \mathrm{~J}$ $\mathrm{s}, \mathrm{c}=3 \times 10^{8} \mathrm{~m} / \mathrm{s}, \mathrm{e}=1.6 \times 10^{-19} \mathrm{C}$ )
142044 When the light of frequency $2 v_{0}$ (where, $v_{0}$ is threshold frequency), is incident on a metal plate, the maximum velocity of electrons emitted is $v_{1}$. When the frequency of the incident radiation is increased to $5 v_{0}$, the maximum velocity of electrons emitted from the same plate is $v_{2}$. The ratio of $v_{1}$ to $v_{2}$ is
142045 When a beam of $10.6 \mathrm{eV}$ photons of intensity $2.0 \mathrm{~W} / \mathrm{m}^{2}$ falls on a metallic surface of area $1 \times 10^{-4} \mathrm{~m}^{2} 0.53 \%$ of incident photons eject photoelectrons. What is the number of photoelectrons emitted per second?
142051 $A$ and $B$ are two metals with threshold frequencies $1.8 \times 10^{14} \mathrm{~Hz}$ and $2.2 \times 10^{14} \mathrm{~Hz}$. Two identical photons of energy $0.825 \mathrm{eV}$ each are incident on them. Then photoelectrons are emitted in (Take $\mathrm{h}=6.6 \times 10^{-34} \mathrm{Js}$ )
142042 An isolated lead ball is charged upon continuous irradiation by EM radiation of wavelength, $\lambda=221 \mathrm{~nm}$. The maximum potential attained by the lead ball, if its work function is $4.14 \mathrm{eV}$ is (take, $\mathrm{h}=6.63 \times 10^{-34} \mathrm{~J}$ $\mathrm{s}, \mathrm{c}=3 \times 10^{8} \mathrm{~m} / \mathrm{s}, \mathrm{e}=1.6 \times 10^{-19} \mathrm{C}$ )
142044 When the light of frequency $2 v_{0}$ (where, $v_{0}$ is threshold frequency), is incident on a metal plate, the maximum velocity of electrons emitted is $v_{1}$. When the frequency of the incident radiation is increased to $5 v_{0}$, the maximum velocity of electrons emitted from the same plate is $v_{2}$. The ratio of $v_{1}$ to $v_{2}$ is
142045 When a beam of $10.6 \mathrm{eV}$ photons of intensity $2.0 \mathrm{~W} / \mathrm{m}^{2}$ falls on a metallic surface of area $1 \times 10^{-4} \mathrm{~m}^{2} 0.53 \%$ of incident photons eject photoelectrons. What is the number of photoelectrons emitted per second?
142051 $A$ and $B$ are two metals with threshold frequencies $1.8 \times 10^{14} \mathrm{~Hz}$ and $2.2 \times 10^{14} \mathrm{~Hz}$. Two identical photons of energy $0.825 \mathrm{eV}$ each are incident on them. Then photoelectrons are emitted in (Take $\mathrm{h}=6.6 \times 10^{-34} \mathrm{Js}$ )
142042 An isolated lead ball is charged upon continuous irradiation by EM radiation of wavelength, $\lambda=221 \mathrm{~nm}$. The maximum potential attained by the lead ball, if its work function is $4.14 \mathrm{eV}$ is (take, $\mathrm{h}=6.63 \times 10^{-34} \mathrm{~J}$ $\mathrm{s}, \mathrm{c}=3 \times 10^{8} \mathrm{~m} / \mathrm{s}, \mathrm{e}=1.6 \times 10^{-19} \mathrm{C}$ )
142044 When the light of frequency $2 v_{0}$ (where, $v_{0}$ is threshold frequency), is incident on a metal plate, the maximum velocity of electrons emitted is $v_{1}$. When the frequency of the incident radiation is increased to $5 v_{0}$, the maximum velocity of electrons emitted from the same plate is $v_{2}$. The ratio of $v_{1}$ to $v_{2}$ is
142045 When a beam of $10.6 \mathrm{eV}$ photons of intensity $2.0 \mathrm{~W} / \mathrm{m}^{2}$ falls on a metallic surface of area $1 \times 10^{-4} \mathrm{~m}^{2} 0.53 \%$ of incident photons eject photoelectrons. What is the number of photoelectrons emitted per second?
142051 $A$ and $B$ are two metals with threshold frequencies $1.8 \times 10^{14} \mathrm{~Hz}$ and $2.2 \times 10^{14} \mathrm{~Hz}$. Two identical photons of energy $0.825 \mathrm{eV}$ each are incident on them. Then photoelectrons are emitted in (Take $\mathrm{h}=6.6 \times 10^{-34} \mathrm{Js}$ )
142042 An isolated lead ball is charged upon continuous irradiation by EM radiation of wavelength, $\lambda=221 \mathrm{~nm}$. The maximum potential attained by the lead ball, if its work function is $4.14 \mathrm{eV}$ is (take, $\mathrm{h}=6.63 \times 10^{-34} \mathrm{~J}$ $\mathrm{s}, \mathrm{c}=3 \times 10^{8} \mathrm{~m} / \mathrm{s}, \mathrm{e}=1.6 \times 10^{-19} \mathrm{C}$ )
142044 When the light of frequency $2 v_{0}$ (where, $v_{0}$ is threshold frequency), is incident on a metal plate, the maximum velocity of electrons emitted is $v_{1}$. When the frequency of the incident radiation is increased to $5 v_{0}$, the maximum velocity of electrons emitted from the same plate is $v_{2}$. The ratio of $v_{1}$ to $v_{2}$ is
142045 When a beam of $10.6 \mathrm{eV}$ photons of intensity $2.0 \mathrm{~W} / \mathrm{m}^{2}$ falls on a metallic surface of area $1 \times 10^{-4} \mathrm{~m}^{2} 0.53 \%$ of incident photons eject photoelectrons. What is the number of photoelectrons emitted per second?
142051 $A$ and $B$ are two metals with threshold frequencies $1.8 \times 10^{14} \mathrm{~Hz}$ and $2.2 \times 10^{14} \mathrm{~Hz}$. Two identical photons of energy $0.825 \mathrm{eV}$ each are incident on them. Then photoelectrons are emitted in (Take $\mathrm{h}=6.6 \times 10^{-34} \mathrm{Js}$ )
142042 An isolated lead ball is charged upon continuous irradiation by EM radiation of wavelength, $\lambda=221 \mathrm{~nm}$. The maximum potential attained by the lead ball, if its work function is $4.14 \mathrm{eV}$ is (take, $\mathrm{h}=6.63 \times 10^{-34} \mathrm{~J}$ $\mathrm{s}, \mathrm{c}=3 \times 10^{8} \mathrm{~m} / \mathrm{s}, \mathrm{e}=1.6 \times 10^{-19} \mathrm{C}$ )
142044 When the light of frequency $2 v_{0}$ (where, $v_{0}$ is threshold frequency), is incident on a metal plate, the maximum velocity of electrons emitted is $v_{1}$. When the frequency of the incident radiation is increased to $5 v_{0}$, the maximum velocity of electrons emitted from the same plate is $v_{2}$. The ratio of $v_{1}$ to $v_{2}$ is
142045 When a beam of $10.6 \mathrm{eV}$ photons of intensity $2.0 \mathrm{~W} / \mathrm{m}^{2}$ falls on a metallic surface of area $1 \times 10^{-4} \mathrm{~m}^{2} 0.53 \%$ of incident photons eject photoelectrons. What is the number of photoelectrons emitted per second?
142051 $A$ and $B$ are two metals with threshold frequencies $1.8 \times 10^{14} \mathrm{~Hz}$ and $2.2 \times 10^{14} \mathrm{~Hz}$. Two identical photons of energy $0.825 \mathrm{eV}$ each are incident on them. Then photoelectrons are emitted in (Take $\mathrm{h}=6.6 \times 10^{-34} \mathrm{Js}$ )