Photoelectric Effect
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357760 In a photoelectric experiment, the maximum velocity of photoelectrons emitted

1 Depends on intensity of incident radiation
2 Does not depend on cathode material
3 Depends on frequency of incident radiation
4 Does not depend on wavelength of incident radiation
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357761 When a piece of metal is illuminated by a monochromatic light of wavelength \(\lambda\), then stopping potential is \(3\;{V_s}\). When same surface is illuminated by light of wavelength \(2 \lambda\), then stopping potential becomes \({V_s}\). The value of threshold wavelength for photoelectric emission will be

1 \((4 \lambda) / 3\)
2 \(6 \lambda\)
3 \(4 \lambda\)
4 \(8 \lambda\)
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357762 A metal surface is illuminated by light of two different wavelengths \(248\;nm\) and \(310\;nm\). The maximum speeds of the photoelectrons corresponding to these wavelengths are \(u_{1}\) and \(u_{2}\) respectively. If \(u_{1}: u_{2}=2: 1\) and \(hc = 1240\,eV - nm\), the work function of the metal is nearly

1 \(3.2\,eV\)
2 \(3.7\,eV\)
3 \(2.5\,eV\)
4 \(2.8\,eV\)
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357763 When the light of frequency \(2 {\nu_0}\) (where \({\nu_0}\) 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 \(5{\nu_0}\) the maximum velocity of electrons emitted from the same plate is
v
\({_2}\). The ratio of
v
\({_1}\) to
v
\({_2}\) is

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

357760 In a photoelectric experiment, the maximum velocity of photoelectrons emitted

1 Depends on intensity of incident radiation
2 Does not depend on cathode material
3 Depends on frequency of incident radiation
4 Does not depend on wavelength of incident radiation
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357761 When a piece of metal is illuminated by a monochromatic light of wavelength \(\lambda\), then stopping potential is \(3\;{V_s}\). When same surface is illuminated by light of wavelength \(2 \lambda\), then stopping potential becomes \({V_s}\). The value of threshold wavelength for photoelectric emission will be

1 \((4 \lambda) / 3\)
2 \(6 \lambda\)
3 \(4 \lambda\)
4 \(8 \lambda\)
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357762 A metal surface is illuminated by light of two different wavelengths \(248\;nm\) and \(310\;nm\). The maximum speeds of the photoelectrons corresponding to these wavelengths are \(u_{1}\) and \(u_{2}\) respectively. If \(u_{1}: u_{2}=2: 1\) and \(hc = 1240\,eV - nm\), the work function of the metal is nearly

1 \(3.2\,eV\)
2 \(3.7\,eV\)
3 \(2.5\,eV\)
4 \(2.8\,eV\)
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357763 When the light of frequency \(2 {\nu_0}\) (where \({\nu_0}\) 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 \(5{\nu_0}\) the maximum velocity of electrons emitted from the same plate is
v
\({_2}\). The ratio of
v
\({_1}\) to
v
\({_2}\) is

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

357760 In a photoelectric experiment, the maximum velocity of photoelectrons emitted

1 Depends on intensity of incident radiation
2 Does not depend on cathode material
3 Depends on frequency of incident radiation
4 Does not depend on wavelength of incident radiation
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357761 When a piece of metal is illuminated by a monochromatic light of wavelength \(\lambda\), then stopping potential is \(3\;{V_s}\). When same surface is illuminated by light of wavelength \(2 \lambda\), then stopping potential becomes \({V_s}\). The value of threshold wavelength for photoelectric emission will be

1 \((4 \lambda) / 3\)
2 \(6 \lambda\)
3 \(4 \lambda\)
4 \(8 \lambda\)
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357762 A metal surface is illuminated by light of two different wavelengths \(248\;nm\) and \(310\;nm\). The maximum speeds of the photoelectrons corresponding to these wavelengths are \(u_{1}\) and \(u_{2}\) respectively. If \(u_{1}: u_{2}=2: 1\) and \(hc = 1240\,eV - nm\), the work function of the metal is nearly

1 \(3.2\,eV\)
2 \(3.7\,eV\)
3 \(2.5\,eV\)
4 \(2.8\,eV\)
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357763 When the light of frequency \(2 {\nu_0}\) (where \({\nu_0}\) 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 \(5{\nu_0}\) the maximum velocity of electrons emitted from the same plate is
v
\({_2}\). The ratio of
v
\({_1}\) to
v
\({_2}\) is

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

357760 In a photoelectric experiment, the maximum velocity of photoelectrons emitted

1 Depends on intensity of incident radiation
2 Does not depend on cathode material
3 Depends on frequency of incident radiation
4 Does not depend on wavelength of incident radiation
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357761 When a piece of metal is illuminated by a monochromatic light of wavelength \(\lambda\), then stopping potential is \(3\;{V_s}\). When same surface is illuminated by light of wavelength \(2 \lambda\), then stopping potential becomes \({V_s}\). The value of threshold wavelength for photoelectric emission will be

1 \((4 \lambda) / 3\)
2 \(6 \lambda\)
3 \(4 \lambda\)
4 \(8 \lambda\)
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357762 A metal surface is illuminated by light of two different wavelengths \(248\;nm\) and \(310\;nm\). The maximum speeds of the photoelectrons corresponding to these wavelengths are \(u_{1}\) and \(u_{2}\) respectively. If \(u_{1}: u_{2}=2: 1\) and \(hc = 1240\,eV - nm\), the work function of the metal is nearly

1 \(3.2\,eV\)
2 \(3.7\,eV\)
3 \(2.5\,eV\)
4 \(2.8\,eV\)
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357763 When the light of frequency \(2 {\nu_0}\) (where \({\nu_0}\) 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 \(5{\nu_0}\) the maximum velocity of electrons emitted from the same plate is
v
\({_2}\). The ratio of
v
\({_1}\) to
v
\({_2}\) is

1 \(4: 1\)
2 \(2: 1\)
3 \(1: 4\)
4 \(1: 2\)