Photoelectric Effect
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357700 Anode voltage is at \( + 4\;V\). Incident radiation has frequency \(1.4 \times {10^{15}}\;Hz\) and work function of the photo cathode is \(2.8\,eV\). Find the minimum and maximum kinetic energy of photoelectrons in \(eV\) that reach the collector.

1 0, 2
2 4, 7
3 2, 5
4 0, 7
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357701 Light of two different frequencies whose photons have energies \(1.3\,eV\) and \(2.8\,eV\) respectively, successfully illumminate a metallic surface whose work function is \(0.8\,eV\). the ratio of maximum speeds of emitted electrons will be

1 \(1: 2\)
2 \(1: 5\)
3 \(1: 4\)
4 \(1: 3\)
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357702 When a metallic surface is illuminated with radiation of wavelength \(\lambda\), the stopping potential is \(V\). If the same surface is illuminated with radiation of wavelength \(2 \lambda\), the stopping potential is \(\frac{V}{4}\). The threshold wavelength for the metallic surface is:-

1 \(4 \lambda\)
2 \(5 \lambda\)
3 \(\dfrac{5}{2} \lambda\)
4 \(3 \lambda\)
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357703 When photons of wavelength \(\lambda_{1}\) are incident on an isolated sphere, the corresponding stopping potential is found to be \(V\). When photons of wavelength \(\lambda_{2}\) are used, the corresponding stopping potential was thrice that of the above value. If light of wavelength \(\lambda_{3}\) is used then find the stopping potential for this case:

1 \(\frac{{hc}}{e}\left[ {\frac{1}{{{\lambda _3}}} + \frac{1}{{{\lambda _2}}} - \frac{1}{{{\lambda _1}}}} \right]\)
2 \(\dfrac{h c}{e}\left[\dfrac{1}{\lambda_{3}}+\dfrac{1}{2 \lambda_{2}}-\dfrac{1}{\lambda_{1}}\right]\)
3 \(\dfrac{h c}{e}\left[\dfrac{1}{\lambda_{3}}-\dfrac{1}{\lambda_{2}}-\dfrac{1}{\lambda_{1}}\right]\)
4 \(\dfrac{h c}{e}\left[\dfrac{1}{\lambda_{3}}+\dfrac{1}{2 \lambda_{2}}-\dfrac{3}{2 \lambda_{1}}\right]\)
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357700 Anode voltage is at \( + 4\;V\). Incident radiation has frequency \(1.4 \times {10^{15}}\;Hz\) and work function of the photo cathode is \(2.8\,eV\). Find the minimum and maximum kinetic energy of photoelectrons in \(eV\) that reach the collector.

1 0, 2
2 4, 7
3 2, 5
4 0, 7
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357701 Light of two different frequencies whose photons have energies \(1.3\,eV\) and \(2.8\,eV\) respectively, successfully illumminate a metallic surface whose work function is \(0.8\,eV\). the ratio of maximum speeds of emitted electrons will be

1 \(1: 2\)
2 \(1: 5\)
3 \(1: 4\)
4 \(1: 3\)
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357702 When a metallic surface is illuminated with radiation of wavelength \(\lambda\), the stopping potential is \(V\). If the same surface is illuminated with radiation of wavelength \(2 \lambda\), the stopping potential is \(\frac{V}{4}\). The threshold wavelength for the metallic surface is:-

1 \(4 \lambda\)
2 \(5 \lambda\)
3 \(\dfrac{5}{2} \lambda\)
4 \(3 \lambda\)
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357703 When photons of wavelength \(\lambda_{1}\) are incident on an isolated sphere, the corresponding stopping potential is found to be \(V\). When photons of wavelength \(\lambda_{2}\) are used, the corresponding stopping potential was thrice that of the above value. If light of wavelength \(\lambda_{3}\) is used then find the stopping potential for this case:

1 \(\frac{{hc}}{e}\left[ {\frac{1}{{{\lambda _3}}} + \frac{1}{{{\lambda _2}}} - \frac{1}{{{\lambda _1}}}} \right]\)
2 \(\dfrac{h c}{e}\left[\dfrac{1}{\lambda_{3}}+\dfrac{1}{2 \lambda_{2}}-\dfrac{1}{\lambda_{1}}\right]\)
3 \(\dfrac{h c}{e}\left[\dfrac{1}{\lambda_{3}}-\dfrac{1}{\lambda_{2}}-\dfrac{1}{\lambda_{1}}\right]\)
4 \(\dfrac{h c}{e}\left[\dfrac{1}{\lambda_{3}}+\dfrac{1}{2 \lambda_{2}}-\dfrac{3}{2 \lambda_{1}}\right]\)
NEET Test Series from KOTA - 10 Papers In MS WORD WhatsApp Here
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357700 Anode voltage is at \( + 4\;V\). Incident radiation has frequency \(1.4 \times {10^{15}}\;Hz\) and work function of the photo cathode is \(2.8\,eV\). Find the minimum and maximum kinetic energy of photoelectrons in \(eV\) that reach the collector.

1 0, 2
2 4, 7
3 2, 5
4 0, 7
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357701 Light of two different frequencies whose photons have energies \(1.3\,eV\) and \(2.8\,eV\) respectively, successfully illumminate a metallic surface whose work function is \(0.8\,eV\). the ratio of maximum speeds of emitted electrons will be

1 \(1: 2\)
2 \(1: 5\)
3 \(1: 4\)
4 \(1: 3\)
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357702 When a metallic surface is illuminated with radiation of wavelength \(\lambda\), the stopping potential is \(V\). If the same surface is illuminated with radiation of wavelength \(2 \lambda\), the stopping potential is \(\frac{V}{4}\). The threshold wavelength for the metallic surface is:-

1 \(4 \lambda\)
2 \(5 \lambda\)
3 \(\dfrac{5}{2} \lambda\)
4 \(3 \lambda\)
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357703 When photons of wavelength \(\lambda_{1}\) are incident on an isolated sphere, the corresponding stopping potential is found to be \(V\). When photons of wavelength \(\lambda_{2}\) are used, the corresponding stopping potential was thrice that of the above value. If light of wavelength \(\lambda_{3}\) is used then find the stopping potential for this case:

1 \(\frac{{hc}}{e}\left[ {\frac{1}{{{\lambda _3}}} + \frac{1}{{{\lambda _2}}} - \frac{1}{{{\lambda _1}}}} \right]\)
2 \(\dfrac{h c}{e}\left[\dfrac{1}{\lambda_{3}}+\dfrac{1}{2 \lambda_{2}}-\dfrac{1}{\lambda_{1}}\right]\)
3 \(\dfrac{h c}{e}\left[\dfrac{1}{\lambda_{3}}-\dfrac{1}{\lambda_{2}}-\dfrac{1}{\lambda_{1}}\right]\)
4 \(\dfrac{h c}{e}\left[\dfrac{1}{\lambda_{3}}+\dfrac{1}{2 \lambda_{2}}-\dfrac{3}{2 \lambda_{1}}\right]\)
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357700 Anode voltage is at \( + 4\;V\). Incident radiation has frequency \(1.4 \times {10^{15}}\;Hz\) and work function of the photo cathode is \(2.8\,eV\). Find the minimum and maximum kinetic energy of photoelectrons in \(eV\) that reach the collector.

1 0, 2
2 4, 7
3 2, 5
4 0, 7
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357701 Light of two different frequencies whose photons have energies \(1.3\,eV\) and \(2.8\,eV\) respectively, successfully illumminate a metallic surface whose work function is \(0.8\,eV\). the ratio of maximum speeds of emitted electrons will be

1 \(1: 2\)
2 \(1: 5\)
3 \(1: 4\)
4 \(1: 3\)
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357702 When a metallic surface is illuminated with radiation of wavelength \(\lambda\), the stopping potential is \(V\). If the same surface is illuminated with radiation of wavelength \(2 \lambda\), the stopping potential is \(\frac{V}{4}\). The threshold wavelength for the metallic surface is:-

1 \(4 \lambda\)
2 \(5 \lambda\)
3 \(\dfrac{5}{2} \lambda\)
4 \(3 \lambda\)
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357703 When photons of wavelength \(\lambda_{1}\) are incident on an isolated sphere, the corresponding stopping potential is found to be \(V\). When photons of wavelength \(\lambda_{2}\) are used, the corresponding stopping potential was thrice that of the above value. If light of wavelength \(\lambda_{3}\) is used then find the stopping potential for this case:

1 \(\frac{{hc}}{e}\left[ {\frac{1}{{{\lambda _3}}} + \frac{1}{{{\lambda _2}}} - \frac{1}{{{\lambda _1}}}} \right]\)
2 \(\dfrac{h c}{e}\left[\dfrac{1}{\lambda_{3}}+\dfrac{1}{2 \lambda_{2}}-\dfrac{1}{\lambda_{1}}\right]\)
3 \(\dfrac{h c}{e}\left[\dfrac{1}{\lambda_{3}}-\dfrac{1}{\lambda_{2}}-\dfrac{1}{\lambda_{1}}\right]\)
4 \(\dfrac{h c}{e}\left[\dfrac{1}{\lambda_{3}}+\dfrac{1}{2 \lambda_{2}}-\dfrac{3}{2 \lambda_{1}}\right]\)