Photoelectric Effect
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357738 Radiation of wavelength \(\lambda\), is incident on a photocell. The fastest emitted electron has speed \(v\). If the wavelength is changed to \(\dfrac{3 \lambda}{4}\), the speed of the fastest emitted electron will be:

1 \(>v\left(\dfrac{4}{3}\right)^{1 / 2}\)
2 \( < v\left(\dfrac{4}{3}\right)^{1 / 2}\)
3 \(=v\left(\dfrac{4}{3}\right)^{1 / 2}\)
4 \(=v\left(\dfrac{3}{4}\right)^{1 / 2}\)
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357739 According to Einstein's photoelectric equation, the plot of the kinetic energy of the emitted photo electrons from a metal versus the frequency, of the incident radiation gives a straight line whose slope

1 Is the same for all metals and independent of the intensity of the radiation
2 Depends on the intensity of the radiation
3 Depends both on the intensity of the radiation and the metal used
4 Depends on the nature of the metals used
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357740 In the figure shown electromagnetic radiations of wavelength \(200\,nm\) are incident on the metallic plate \({A}\). The photo electrons are accelerated by a potential difference \(10\,V\). These electrons strike another metal plate \({B}\) from which electromagnetic radiations are emitted. The minimum wavelength of the emitted photons is \(100\,nm\). If the work function of the metal ' \({A}\) ' is found to be \(1.9\,NeV\). The value of \({N}\) is ____ .
supporting img
Use \(hv = 12400\,eV\) \( \mathop A^{~~\circ} \), use \(Rch = 13.6\,eV.\)

1 \(2.5\,eV\)
2 \(5.2\,eV\)
3 \(1.8\,eV\)
4 \(3.8\,eV\)
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357741 Maximum velocity of the photoelectrons emitted by a metal surface \(1.2 \times {10^6}\;m{s^{ - 1}}\). Assuming the specific charge of the electron to be \(1.8 \times {10^{11}}Ck{g^{ - 1}},\) the value of the stopping potential in volt will be

1 2
2 3
3 4
4 6
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357742 Work-function for caesium metal is \(2.14\,eV.\) Let a beam of light of frequency \(6 \times {10^{14}}\;Hz\) is incident over the metal surface. Now, match the following columns and choose the correct option
Column I
Column II
A
maximum \(KE\) of emitted photoelectrons (in \(eV\))
P
334 \(km{s^{ - 1}}\)
B
Minimum \(KE\) of emitted photoelectrons (in \(eV\)
Q
345 \(mV\)
C
Stopping potential of material ( in \(mV\)) is
R
\(0.345\,eV\)
D
Maximum speed of the emitted photoelectrons ( in \(km{s^{ - 1}}\))
S
0

1 \({\rm{A - S,}}\,{\rm{B - R,}}\,{\rm{C - Q,}}\,{\rm{D - P}}\)
2 \({\rm{A - R,}}\,{\rm{B - S,}}\,{\rm{C - Q,}}\,{\rm{D - P}}\)
3 \({\rm{A - R,}}\,{\rm{B - P,}}\,{\rm{C - S,}}\,{\rm{D - P}}\)
4 \({\rm{A - Q,}}\,{\rm{B - P,}}\,{\rm{C - S,}}\,{\rm{D - R}}\)
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357738 Radiation of wavelength \(\lambda\), is incident on a photocell. The fastest emitted electron has speed \(v\). If the wavelength is changed to \(\dfrac{3 \lambda}{4}\), the speed of the fastest emitted electron will be:

1 \(>v\left(\dfrac{4}{3}\right)^{1 / 2}\)
2 \( < v\left(\dfrac{4}{3}\right)^{1 / 2}\)
3 \(=v\left(\dfrac{4}{3}\right)^{1 / 2}\)
4 \(=v\left(\dfrac{3}{4}\right)^{1 / 2}\)
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357739 According to Einstein's photoelectric equation, the plot of the kinetic energy of the emitted photo electrons from a metal versus the frequency, of the incident radiation gives a straight line whose slope

1 Is the same for all metals and independent of the intensity of the radiation
2 Depends on the intensity of the radiation
3 Depends both on the intensity of the radiation and the metal used
4 Depends on the nature of the metals used
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357740 In the figure shown electromagnetic radiations of wavelength \(200\,nm\) are incident on the metallic plate \({A}\). The photo electrons are accelerated by a potential difference \(10\,V\). These electrons strike another metal plate \({B}\) from which electromagnetic radiations are emitted. The minimum wavelength of the emitted photons is \(100\,nm\). If the work function of the metal ' \({A}\) ' is found to be \(1.9\,NeV\). The value of \({N}\) is ____ .
supporting img
Use \(hv = 12400\,eV\) \( \mathop A^{~~\circ} \), use \(Rch = 13.6\,eV.\)

1 \(2.5\,eV\)
2 \(5.2\,eV\)
3 \(1.8\,eV\)
4 \(3.8\,eV\)
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357741 Maximum velocity of the photoelectrons emitted by a metal surface \(1.2 \times {10^6}\;m{s^{ - 1}}\). Assuming the specific charge of the electron to be \(1.8 \times {10^{11}}Ck{g^{ - 1}},\) the value of the stopping potential in volt will be

1 2
2 3
3 4
4 6
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357742 Work-function for caesium metal is \(2.14\,eV.\) Let a beam of light of frequency \(6 \times {10^{14}}\;Hz\) is incident over the metal surface. Now, match the following columns and choose the correct option
Column I
Column II
A
maximum \(KE\) of emitted photoelectrons (in \(eV\))
P
334 \(km{s^{ - 1}}\)
B
Minimum \(KE\) of emitted photoelectrons (in \(eV\)
Q
345 \(mV\)
C
Stopping potential of material ( in \(mV\)) is
R
\(0.345\,eV\)
D
Maximum speed of the emitted photoelectrons ( in \(km{s^{ - 1}}\))
S
0

1 \({\rm{A - S,}}\,{\rm{B - R,}}\,{\rm{C - Q,}}\,{\rm{D - P}}\)
2 \({\rm{A - R,}}\,{\rm{B - S,}}\,{\rm{C - Q,}}\,{\rm{D - P}}\)
3 \({\rm{A - R,}}\,{\rm{B - P,}}\,{\rm{C - S,}}\,{\rm{D - P}}\)
4 \({\rm{A - Q,}}\,{\rm{B - P,}}\,{\rm{C - S,}}\,{\rm{D - R}}\)
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357738 Radiation of wavelength \(\lambda\), is incident on a photocell. The fastest emitted electron has speed \(v\). If the wavelength is changed to \(\dfrac{3 \lambda}{4}\), the speed of the fastest emitted electron will be:

1 \(>v\left(\dfrac{4}{3}\right)^{1 / 2}\)
2 \( < v\left(\dfrac{4}{3}\right)^{1 / 2}\)
3 \(=v\left(\dfrac{4}{3}\right)^{1 / 2}\)
4 \(=v\left(\dfrac{3}{4}\right)^{1 / 2}\)
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357739 According to Einstein's photoelectric equation, the plot of the kinetic energy of the emitted photo electrons from a metal versus the frequency, of the incident radiation gives a straight line whose slope

1 Is the same for all metals and independent of the intensity of the radiation
2 Depends on the intensity of the radiation
3 Depends both on the intensity of the radiation and the metal used
4 Depends on the nature of the metals used
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357740 In the figure shown electromagnetic radiations of wavelength \(200\,nm\) are incident on the metallic plate \({A}\). The photo electrons are accelerated by a potential difference \(10\,V\). These electrons strike another metal plate \({B}\) from which electromagnetic radiations are emitted. The minimum wavelength of the emitted photons is \(100\,nm\). If the work function of the metal ' \({A}\) ' is found to be \(1.9\,NeV\). The value of \({N}\) is ____ .
supporting img
Use \(hv = 12400\,eV\) \( \mathop A^{~~\circ} \), use \(Rch = 13.6\,eV.\)

1 \(2.5\,eV\)
2 \(5.2\,eV\)
3 \(1.8\,eV\)
4 \(3.8\,eV\)
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357741 Maximum velocity of the photoelectrons emitted by a metal surface \(1.2 \times {10^6}\;m{s^{ - 1}}\). Assuming the specific charge of the electron to be \(1.8 \times {10^{11}}Ck{g^{ - 1}},\) the value of the stopping potential in volt will be

1 2
2 3
3 4
4 6
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357742 Work-function for caesium metal is \(2.14\,eV.\) Let a beam of light of frequency \(6 \times {10^{14}}\;Hz\) is incident over the metal surface. Now, match the following columns and choose the correct option
Column I
Column II
A
maximum \(KE\) of emitted photoelectrons (in \(eV\))
P
334 \(km{s^{ - 1}}\)
B
Minimum \(KE\) of emitted photoelectrons (in \(eV\)
Q
345 \(mV\)
C
Stopping potential of material ( in \(mV\)) is
R
\(0.345\,eV\)
D
Maximum speed of the emitted photoelectrons ( in \(km{s^{ - 1}}\))
S
0

1 \({\rm{A - S,}}\,{\rm{B - R,}}\,{\rm{C - Q,}}\,{\rm{D - P}}\)
2 \({\rm{A - R,}}\,{\rm{B - S,}}\,{\rm{C - Q,}}\,{\rm{D - P}}\)
3 \({\rm{A - R,}}\,{\rm{B - P,}}\,{\rm{C - S,}}\,{\rm{D - P}}\)
4 \({\rm{A - Q,}}\,{\rm{B - P,}}\,{\rm{C - S,}}\,{\rm{D - R}}\)
NEET Test Series from KOTA - 10 Papers In MS WORD WhatsApp Here
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357738 Radiation of wavelength \(\lambda\), is incident on a photocell. The fastest emitted electron has speed \(v\). If the wavelength is changed to \(\dfrac{3 \lambda}{4}\), the speed of the fastest emitted electron will be:

1 \(>v\left(\dfrac{4}{3}\right)^{1 / 2}\)
2 \( < v\left(\dfrac{4}{3}\right)^{1 / 2}\)
3 \(=v\left(\dfrac{4}{3}\right)^{1 / 2}\)
4 \(=v\left(\dfrac{3}{4}\right)^{1 / 2}\)
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357739 According to Einstein's photoelectric equation, the plot of the kinetic energy of the emitted photo electrons from a metal versus the frequency, of the incident radiation gives a straight line whose slope

1 Is the same for all metals and independent of the intensity of the radiation
2 Depends on the intensity of the radiation
3 Depends both on the intensity of the radiation and the metal used
4 Depends on the nature of the metals used
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357740 In the figure shown electromagnetic radiations of wavelength \(200\,nm\) are incident on the metallic plate \({A}\). The photo electrons are accelerated by a potential difference \(10\,V\). These electrons strike another metal plate \({B}\) from which electromagnetic radiations are emitted. The minimum wavelength of the emitted photons is \(100\,nm\). If the work function of the metal ' \({A}\) ' is found to be \(1.9\,NeV\). The value of \({N}\) is ____ .
supporting img
Use \(hv = 12400\,eV\) \( \mathop A^{~~\circ} \), use \(Rch = 13.6\,eV.\)

1 \(2.5\,eV\)
2 \(5.2\,eV\)
3 \(1.8\,eV\)
4 \(3.8\,eV\)
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357741 Maximum velocity of the photoelectrons emitted by a metal surface \(1.2 \times {10^6}\;m{s^{ - 1}}\). Assuming the specific charge of the electron to be \(1.8 \times {10^{11}}Ck{g^{ - 1}},\) the value of the stopping potential in volt will be

1 2
2 3
3 4
4 6
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357742 Work-function for caesium metal is \(2.14\,eV.\) Let a beam of light of frequency \(6 \times {10^{14}}\;Hz\) is incident over the metal surface. Now, match the following columns and choose the correct option
Column I
Column II
A
maximum \(KE\) of emitted photoelectrons (in \(eV\))
P
334 \(km{s^{ - 1}}\)
B
Minimum \(KE\) of emitted photoelectrons (in \(eV\)
Q
345 \(mV\)
C
Stopping potential of material ( in \(mV\)) is
R
\(0.345\,eV\)
D
Maximum speed of the emitted photoelectrons ( in \(km{s^{ - 1}}\))
S
0

1 \({\rm{A - S,}}\,{\rm{B - R,}}\,{\rm{C - Q,}}\,{\rm{D - P}}\)
2 \({\rm{A - R,}}\,{\rm{B - S,}}\,{\rm{C - Q,}}\,{\rm{D - P}}\)
3 \({\rm{A - R,}}\,{\rm{B - P,}}\,{\rm{C - S,}}\,{\rm{D - P}}\)
4 \({\rm{A - Q,}}\,{\rm{B - P,}}\,{\rm{C - S,}}\,{\rm{D - R}}\)
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357738 Radiation of wavelength \(\lambda\), is incident on a photocell. The fastest emitted electron has speed \(v\). If the wavelength is changed to \(\dfrac{3 \lambda}{4}\), the speed of the fastest emitted electron will be:

1 \(>v\left(\dfrac{4}{3}\right)^{1 / 2}\)
2 \( < v\left(\dfrac{4}{3}\right)^{1 / 2}\)
3 \(=v\left(\dfrac{4}{3}\right)^{1 / 2}\)
4 \(=v\left(\dfrac{3}{4}\right)^{1 / 2}\)
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357739 According to Einstein's photoelectric equation, the plot of the kinetic energy of the emitted photo electrons from a metal versus the frequency, of the incident radiation gives a straight line whose slope

1 Is the same for all metals and independent of the intensity of the radiation
2 Depends on the intensity of the radiation
3 Depends both on the intensity of the radiation and the metal used
4 Depends on the nature of the metals used
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357740 In the figure shown electromagnetic radiations of wavelength \(200\,nm\) are incident on the metallic plate \({A}\). The photo electrons are accelerated by a potential difference \(10\,V\). These electrons strike another metal plate \({B}\) from which electromagnetic radiations are emitted. The minimum wavelength of the emitted photons is \(100\,nm\). If the work function of the metal ' \({A}\) ' is found to be \(1.9\,NeV\). The value of \({N}\) is ____ .
supporting img
Use \(hv = 12400\,eV\) \( \mathop A^{~~\circ} \), use \(Rch = 13.6\,eV.\)

1 \(2.5\,eV\)
2 \(5.2\,eV\)
3 \(1.8\,eV\)
4 \(3.8\,eV\)
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357741 Maximum velocity of the photoelectrons emitted by a metal surface \(1.2 \times {10^6}\;m{s^{ - 1}}\). Assuming the specific charge of the electron to be \(1.8 \times {10^{11}}Ck{g^{ - 1}},\) the value of the stopping potential in volt will be

1 2
2 3
3 4
4 6
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357742 Work-function for caesium metal is \(2.14\,eV.\) Let a beam of light of frequency \(6 \times {10^{14}}\;Hz\) is incident over the metal surface. Now, match the following columns and choose the correct option
Column I
Column II
A
maximum \(KE\) of emitted photoelectrons (in \(eV\))
P
334 \(km{s^{ - 1}}\)
B
Minimum \(KE\) of emitted photoelectrons (in \(eV\)
Q
345 \(mV\)
C
Stopping potential of material ( in \(mV\)) is
R
\(0.345\,eV\)
D
Maximum speed of the emitted photoelectrons ( in \(km{s^{ - 1}}\))
S
0

1 \({\rm{A - S,}}\,{\rm{B - R,}}\,{\rm{C - Q,}}\,{\rm{D - P}}\)
2 \({\rm{A - R,}}\,{\rm{B - S,}}\,{\rm{C - Q,}}\,{\rm{D - P}}\)
3 \({\rm{A - R,}}\,{\rm{B - P,}}\,{\rm{C - S,}}\,{\rm{D - P}}\)
4 \({\rm{A - Q,}}\,{\rm{B - P,}}\,{\rm{C - S,}}\,{\rm{D - R}}\)