Photoelectric Effect
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PHXII11:DUAL NATURE OF RADIATION AND MATTER

357747 Statement A :
The kinetic energy of phototelectrons emitted from metal surface does not depend on the intensity of incident photon
Statement B :
The ejection of electrons from metallic surface is not possible with frequency of incident photons below the threshold frequency.

1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357748 A photosensitive metallic surface has work function, \(h v_{0}\). If photons of energy \(2 h v_{0}\) fall on this surface, the electrons come out with a maximum velocity of \(4 \times {10^6}\;m{\rm{/}}s\). When the photon energy is increased to \(5 h v_{0}\), then maximum velocity of photoelectrons will be:

1 \(2 \times {10^7}\;m{\rm{/}}s\)
2 \(2 \times {10^6}\;m{\rm{/}}s\)
3 \(8 \times {10^5}\;m{\rm{/}}s\)
4 \(8 \times {10^6}\;m{\rm{/}}s\)
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357749 Two identical metal plates show photoelectric effect by a light of wavelength \({\lambda _A}\) falls on plate A and \(\lambda_{B}\) on plate \(B\left(\lambda_{A}=2 \lambda_{B}\right)\). The maximum kinetic energy is

1 \(K_{A} < \dfrac{K_{B}}{2}\)
2 \(3 K_{A}=K_{B}\)
3 \(K_{A}=\dfrac{K_{B}}{2}\)
4 \(K_{A}=2 K_{B}\)
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357750 The velocity of the most energetic electrons emitted from a metallic surface is doubled when the frequency \(v\) of the incident radiation is doubled. The work function of this metal is:

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

357747 Statement A :
The kinetic energy of phototelectrons emitted from metal surface does not depend on the intensity of incident photon
Statement B :
The ejection of electrons from metallic surface is not possible with frequency of incident photons below the threshold frequency.

1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357748 A photosensitive metallic surface has work function, \(h v_{0}\). If photons of energy \(2 h v_{0}\) fall on this surface, the electrons come out with a maximum velocity of \(4 \times {10^6}\;m{\rm{/}}s\). When the photon energy is increased to \(5 h v_{0}\), then maximum velocity of photoelectrons will be:

1 \(2 \times {10^7}\;m{\rm{/}}s\)
2 \(2 \times {10^6}\;m{\rm{/}}s\)
3 \(8 \times {10^5}\;m{\rm{/}}s\)
4 \(8 \times {10^6}\;m{\rm{/}}s\)
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357749 Two identical metal plates show photoelectric effect by a light of wavelength \({\lambda _A}\) falls on plate A and \(\lambda_{B}\) on plate \(B\left(\lambda_{A}=2 \lambda_{B}\right)\). The maximum kinetic energy is

1 \(K_{A} < \dfrac{K_{B}}{2}\)
2 \(3 K_{A}=K_{B}\)
3 \(K_{A}=\dfrac{K_{B}}{2}\)
4 \(K_{A}=2 K_{B}\)
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357750 The velocity of the most energetic electrons emitted from a metallic surface is doubled when the frequency \(v\) of the incident radiation is doubled. The work function of this metal is:

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

357747 Statement A :
The kinetic energy of phototelectrons emitted from metal surface does not depend on the intensity of incident photon
Statement B :
The ejection of electrons from metallic surface is not possible with frequency of incident photons below the threshold frequency.

1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357748 A photosensitive metallic surface has work function, \(h v_{0}\). If photons of energy \(2 h v_{0}\) fall on this surface, the electrons come out with a maximum velocity of \(4 \times {10^6}\;m{\rm{/}}s\). When the photon energy is increased to \(5 h v_{0}\), then maximum velocity of photoelectrons will be:

1 \(2 \times {10^7}\;m{\rm{/}}s\)
2 \(2 \times {10^6}\;m{\rm{/}}s\)
3 \(8 \times {10^5}\;m{\rm{/}}s\)
4 \(8 \times {10^6}\;m{\rm{/}}s\)
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357749 Two identical metal plates show photoelectric effect by a light of wavelength \({\lambda _A}\) falls on plate A and \(\lambda_{B}\) on plate \(B\left(\lambda_{A}=2 \lambda_{B}\right)\). The maximum kinetic energy is

1 \(K_{A} < \dfrac{K_{B}}{2}\)
2 \(3 K_{A}=K_{B}\)
3 \(K_{A}=\dfrac{K_{B}}{2}\)
4 \(K_{A}=2 K_{B}\)
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357750 The velocity of the most energetic electrons emitted from a metallic surface is doubled when the frequency \(v\) of the incident radiation is doubled. The work function of this metal is:

1 \(\dfrac{h v}{3}\)
2 \(\dfrac{h v}{4}\)
3 \(\dfrac{2 h v}{3}\)
4 \(\dfrac{h v}{2}\)
For More Updates join with Us
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357747 Statement A :
The kinetic energy of phototelectrons emitted from metal surface does not depend on the intensity of incident photon
Statement B :
The ejection of electrons from metallic surface is not possible with frequency of incident photons below the threshold frequency.

1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357748 A photosensitive metallic surface has work function, \(h v_{0}\). If photons of energy \(2 h v_{0}\) fall on this surface, the electrons come out with a maximum velocity of \(4 \times {10^6}\;m{\rm{/}}s\). When the photon energy is increased to \(5 h v_{0}\), then maximum velocity of photoelectrons will be:

1 \(2 \times {10^7}\;m{\rm{/}}s\)
2 \(2 \times {10^6}\;m{\rm{/}}s\)
3 \(8 \times {10^5}\;m{\rm{/}}s\)
4 \(8 \times {10^6}\;m{\rm{/}}s\)
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357749 Two identical metal plates show photoelectric effect by a light of wavelength \({\lambda _A}\) falls on plate A and \(\lambda_{B}\) on plate \(B\left(\lambda_{A}=2 \lambda_{B}\right)\). The maximum kinetic energy is

1 \(K_{A} < \dfrac{K_{B}}{2}\)
2 \(3 K_{A}=K_{B}\)
3 \(K_{A}=\dfrac{K_{B}}{2}\)
4 \(K_{A}=2 K_{B}\)
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357750 The velocity of the most energetic electrons emitted from a metallic surface is doubled when the frequency \(v\) of the incident radiation is doubled. The work function of this metal is:

1 \(\dfrac{h v}{3}\)
2 \(\dfrac{h v}{4}\)
3 \(\dfrac{2 h v}{3}\)
4 \(\dfrac{h v}{2}\)
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