Electron Emission, Photo Electric Effect (Threshol Frequency Stopping Potential)
Dual nature of radiation and Matter

142099 In photoelectric effect, initially when energy of electrons emitted is $E_{0}$, de-Broglie wavelength associated with them is $\lambda_{0}$. Now, energy is doubled then associated de- Broglie wavelength $\lambda^{\prime}$ is

1 $\lambda^{\prime}=\frac{\lambda_{\mathrm{o}}}{\sqrt{2}}$
2 $\lambda^{\prime}=\sqrt{2 \lambda_{0}}$
3 $\lambda^{\prime}=\lambda_{\mathrm{o}}$
4 $\lambda^{\prime}=\frac{\lambda_{\mathrm{o}}}{2}$
Dual nature of radiation and Matter

142101 When the momentum of a photon is changed by an amount $p^{\prime}$ then the corresponding change in the de-Broglie wavelength is found to be $0.20 \%$ Then, the original momentum of the photon was

1 $300 p^{\prime}$
2 $500 p^{\prime}$
3 $400 \mathrm{p}^{\prime}$
4 $100 \mathrm{p}^{\prime}$
Dual nature of radiation and Matter

142103 The frequency of incident light falling on a photosensitive metal plate is doubled, the kinetic energy of the emitted photoelectrons is

1 double the earlier value
2 unchanged
3 more than doubled
4 less than doubled
Dual nature of radiation and Matter

142104 The work function of a certain metal is $3.31 \times 10^{-19} \mathrm{~J}$. Then, the maximum kinetic energy of photoelectrons emitted by incident radiation of wavelength $5000 \AA$ is (Given, $h=6.62 \times 10^{-34} \mathrm{~J}$ $\mathrm{s}, \mathrm{c}=3 \times 10^{8} \mathrm{~ms}^{-1}, \mathrm{e}=1.6 \times 10^{-19} \mathrm{C}$ )

1 $2.48 \mathrm{eV}$
2 $0.41 \mathrm{eV}$
3 $2.07 \mathrm{eV}$
4 $0.82 \mathrm{eV}$
Dual nature of radiation and Matter

142105 The variation of photocurrent with collector potential for different frequencies of incident radiation $v_{1}, v_{2}$ and $v_{3}$ is shown in the graph, then:

1 $v_{1}=v_{2}=v_{3}$
2 $v_{1}>v_{2}>v_{3}$
3 $v_{1} \lt v_{2} \lt v_{3}$
4 $v_{3}=\frac{v_{1}+v_{2}}{2}$
Dual nature of radiation and Matter

142099 In photoelectric effect, initially when energy of electrons emitted is $E_{0}$, de-Broglie wavelength associated with them is $\lambda_{0}$. Now, energy is doubled then associated de- Broglie wavelength $\lambda^{\prime}$ is

1 $\lambda^{\prime}=\frac{\lambda_{\mathrm{o}}}{\sqrt{2}}$
2 $\lambda^{\prime}=\sqrt{2 \lambda_{0}}$
3 $\lambda^{\prime}=\lambda_{\mathrm{o}}$
4 $\lambda^{\prime}=\frac{\lambda_{\mathrm{o}}}{2}$
Dual nature of radiation and Matter

142101 When the momentum of a photon is changed by an amount $p^{\prime}$ then the corresponding change in the de-Broglie wavelength is found to be $0.20 \%$ Then, the original momentum of the photon was

1 $300 p^{\prime}$
2 $500 p^{\prime}$
3 $400 \mathrm{p}^{\prime}$
4 $100 \mathrm{p}^{\prime}$
Dual nature of radiation and Matter

142103 The frequency of incident light falling on a photosensitive metal plate is doubled, the kinetic energy of the emitted photoelectrons is

1 double the earlier value
2 unchanged
3 more than doubled
4 less than doubled
Dual nature of radiation and Matter

142104 The work function of a certain metal is $3.31 \times 10^{-19} \mathrm{~J}$. Then, the maximum kinetic energy of photoelectrons emitted by incident radiation of wavelength $5000 \AA$ is (Given, $h=6.62 \times 10^{-34} \mathrm{~J}$ $\mathrm{s}, \mathrm{c}=3 \times 10^{8} \mathrm{~ms}^{-1}, \mathrm{e}=1.6 \times 10^{-19} \mathrm{C}$ )

1 $2.48 \mathrm{eV}$
2 $0.41 \mathrm{eV}$
3 $2.07 \mathrm{eV}$
4 $0.82 \mathrm{eV}$
Dual nature of radiation and Matter

142105 The variation of photocurrent with collector potential for different frequencies of incident radiation $v_{1}, v_{2}$ and $v_{3}$ is shown in the graph, then:

1 $v_{1}=v_{2}=v_{3}$
2 $v_{1}>v_{2}>v_{3}$
3 $v_{1} \lt v_{2} \lt v_{3}$
4 $v_{3}=\frac{v_{1}+v_{2}}{2}$
Dual nature of radiation and Matter

142099 In photoelectric effect, initially when energy of electrons emitted is $E_{0}$, de-Broglie wavelength associated with them is $\lambda_{0}$. Now, energy is doubled then associated de- Broglie wavelength $\lambda^{\prime}$ is

1 $\lambda^{\prime}=\frac{\lambda_{\mathrm{o}}}{\sqrt{2}}$
2 $\lambda^{\prime}=\sqrt{2 \lambda_{0}}$
3 $\lambda^{\prime}=\lambda_{\mathrm{o}}$
4 $\lambda^{\prime}=\frac{\lambda_{\mathrm{o}}}{2}$
Dual nature of radiation and Matter

142101 When the momentum of a photon is changed by an amount $p^{\prime}$ then the corresponding change in the de-Broglie wavelength is found to be $0.20 \%$ Then, the original momentum of the photon was

1 $300 p^{\prime}$
2 $500 p^{\prime}$
3 $400 \mathrm{p}^{\prime}$
4 $100 \mathrm{p}^{\prime}$
Dual nature of radiation and Matter

142103 The frequency of incident light falling on a photosensitive metal plate is doubled, the kinetic energy of the emitted photoelectrons is

1 double the earlier value
2 unchanged
3 more than doubled
4 less than doubled
Dual nature of radiation and Matter

142104 The work function of a certain metal is $3.31 \times 10^{-19} \mathrm{~J}$. Then, the maximum kinetic energy of photoelectrons emitted by incident radiation of wavelength $5000 \AA$ is (Given, $h=6.62 \times 10^{-34} \mathrm{~J}$ $\mathrm{s}, \mathrm{c}=3 \times 10^{8} \mathrm{~ms}^{-1}, \mathrm{e}=1.6 \times 10^{-19} \mathrm{C}$ )

1 $2.48 \mathrm{eV}$
2 $0.41 \mathrm{eV}$
3 $2.07 \mathrm{eV}$
4 $0.82 \mathrm{eV}$
Dual nature of radiation and Matter

142105 The variation of photocurrent with collector potential for different frequencies of incident radiation $v_{1}, v_{2}$ and $v_{3}$ is shown in the graph, then:

1 $v_{1}=v_{2}=v_{3}$
2 $v_{1}>v_{2}>v_{3}$
3 $v_{1} \lt v_{2} \lt v_{3}$
4 $v_{3}=\frac{v_{1}+v_{2}}{2}$
Dual nature of radiation and Matter

142099 In photoelectric effect, initially when energy of electrons emitted is $E_{0}$, de-Broglie wavelength associated with them is $\lambda_{0}$. Now, energy is doubled then associated de- Broglie wavelength $\lambda^{\prime}$ is

1 $\lambda^{\prime}=\frac{\lambda_{\mathrm{o}}}{\sqrt{2}}$
2 $\lambda^{\prime}=\sqrt{2 \lambda_{0}}$
3 $\lambda^{\prime}=\lambda_{\mathrm{o}}$
4 $\lambda^{\prime}=\frac{\lambda_{\mathrm{o}}}{2}$
Dual nature of radiation and Matter

142101 When the momentum of a photon is changed by an amount $p^{\prime}$ then the corresponding change in the de-Broglie wavelength is found to be $0.20 \%$ Then, the original momentum of the photon was

1 $300 p^{\prime}$
2 $500 p^{\prime}$
3 $400 \mathrm{p}^{\prime}$
4 $100 \mathrm{p}^{\prime}$
Dual nature of radiation and Matter

142103 The frequency of incident light falling on a photosensitive metal plate is doubled, the kinetic energy of the emitted photoelectrons is

1 double the earlier value
2 unchanged
3 more than doubled
4 less than doubled
Dual nature of radiation and Matter

142104 The work function of a certain metal is $3.31 \times 10^{-19} \mathrm{~J}$. Then, the maximum kinetic energy of photoelectrons emitted by incident radiation of wavelength $5000 \AA$ is (Given, $h=6.62 \times 10^{-34} \mathrm{~J}$ $\mathrm{s}, \mathrm{c}=3 \times 10^{8} \mathrm{~ms}^{-1}, \mathrm{e}=1.6 \times 10^{-19} \mathrm{C}$ )

1 $2.48 \mathrm{eV}$
2 $0.41 \mathrm{eV}$
3 $2.07 \mathrm{eV}$
4 $0.82 \mathrm{eV}$
Dual nature of radiation and Matter

142105 The variation of photocurrent with collector potential for different frequencies of incident radiation $v_{1}, v_{2}$ and $v_{3}$ is shown in the graph, then:

1 $v_{1}=v_{2}=v_{3}$
2 $v_{1}>v_{2}>v_{3}$
3 $v_{1} \lt v_{2} \lt v_{3}$
4 $v_{3}=\frac{v_{1}+v_{2}}{2}$
Dual nature of radiation and Matter

142099 In photoelectric effect, initially when energy of electrons emitted is $E_{0}$, de-Broglie wavelength associated with them is $\lambda_{0}$. Now, energy is doubled then associated de- Broglie wavelength $\lambda^{\prime}$ is

1 $\lambda^{\prime}=\frac{\lambda_{\mathrm{o}}}{\sqrt{2}}$
2 $\lambda^{\prime}=\sqrt{2 \lambda_{0}}$
3 $\lambda^{\prime}=\lambda_{\mathrm{o}}$
4 $\lambda^{\prime}=\frac{\lambda_{\mathrm{o}}}{2}$
Dual nature of radiation and Matter

142101 When the momentum of a photon is changed by an amount $p^{\prime}$ then the corresponding change in the de-Broglie wavelength is found to be $0.20 \%$ Then, the original momentum of the photon was

1 $300 p^{\prime}$
2 $500 p^{\prime}$
3 $400 \mathrm{p}^{\prime}$
4 $100 \mathrm{p}^{\prime}$
Dual nature of radiation and Matter

142103 The frequency of incident light falling on a photosensitive metal plate is doubled, the kinetic energy of the emitted photoelectrons is

1 double the earlier value
2 unchanged
3 more than doubled
4 less than doubled
Dual nature of radiation and Matter

142104 The work function of a certain metal is $3.31 \times 10^{-19} \mathrm{~J}$. Then, the maximum kinetic energy of photoelectrons emitted by incident radiation of wavelength $5000 \AA$ is (Given, $h=6.62 \times 10^{-34} \mathrm{~J}$ $\mathrm{s}, \mathrm{c}=3 \times 10^{8} \mathrm{~ms}^{-1}, \mathrm{e}=1.6 \times 10^{-19} \mathrm{C}$ )

1 $2.48 \mathrm{eV}$
2 $0.41 \mathrm{eV}$
3 $2.07 \mathrm{eV}$
4 $0.82 \mathrm{eV}$
Dual nature of radiation and Matter

142105 The variation of photocurrent with collector potential for different frequencies of incident radiation $v_{1}, v_{2}$ and $v_{3}$ is shown in the graph, then:

1 $v_{1}=v_{2}=v_{3}$
2 $v_{1}>v_{2}>v_{3}$
3 $v_{1} \lt v_{2} \lt v_{3}$
4 $v_{3}=\frac{v_{1}+v_{2}}{2}$