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

142066 A $5 \mathrm{~W}$ source emits monochromatic light of wavelength $5000 \AA$. When placed $0.5 \mathrm{~m}$ away, it liberates photoelectrons from a photosensitive metallic surface. When the source is moved to a distance of $1.0 \mathrm{~m}$, the number of photoelectrons liberated will be reduced by a factor of

1 4
2 8
3 16
4 2
UPSEE - 2007
Dual nature of radiation and Matter

142070 If e/m of electron is $1.76 \times 10^{11} \mathrm{C} \mathrm{kg}^{-1}$ and the stopping potential is $0.71 \mathrm{~V}$, then the maximum velocity of the photo-electron is

1 $150 \mathrm{kms}^{-1}$
2 $200 \mathrm{kms}^{-1}$
3 $500 \mathrm{kms}^{-1}$
4 $250 \mathrm{kms}^{-1}$
5 $100 \mathrm{kms}^{-1}$
Kerala CEE - 2011
Dual nature of radiation and Matter

142073 In a photo electric effect experiment the maximum kinetic energy of the emitted electrons is $1 \mathrm{e} V$ for incoming radiation of frequency $v_{0}$ and $3 \mathrm{e} V$ for incoming radiation of frequency $3 v_{0} / 2$. What is the maximum kinetic energy of the electrons emitted for incoming radiations of frequency $9 v_{0} / 4$ ?

1 $3 \mathrm{eV}$
2 $4.5 \mathrm{eV}$
3 $6 \mathrm{eV}$
4 $9 \mathrm{eV}$
JCECE-2013
Dual nature of radiation and Matter

142081 Assertion: The energy (E) and momentum (p) of a photon are related by $\mathrm{p}=\mathrm{E} / \mathrm{c}$
Reason: The photon behaves like a particle.

1 If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
2 If both Assertion and Reason are correct but Reason in not a correct explanation of the Assertion.
3 If the Assertion is correct but Reason is incorrect.
4 If both the Assertion and Reason are incorrect.
5 If the Assertion is incorrect but the Reason is correct.
AIIMS-2005
For More Updates join with Us
Dual nature of radiation and Matter

142066 A $5 \mathrm{~W}$ source emits monochromatic light of wavelength $5000 \AA$. When placed $0.5 \mathrm{~m}$ away, it liberates photoelectrons from a photosensitive metallic surface. When the source is moved to a distance of $1.0 \mathrm{~m}$, the number of photoelectrons liberated will be reduced by a factor of

1 4
2 8
3 16
4 2
UPSEE - 2007
Dual nature of radiation and Matter

142070 If e/m of electron is $1.76 \times 10^{11} \mathrm{C} \mathrm{kg}^{-1}$ and the stopping potential is $0.71 \mathrm{~V}$, then the maximum velocity of the photo-electron is

1 $150 \mathrm{kms}^{-1}$
2 $200 \mathrm{kms}^{-1}$
3 $500 \mathrm{kms}^{-1}$
4 $250 \mathrm{kms}^{-1}$
5 $100 \mathrm{kms}^{-1}$
Kerala CEE - 2011
Dual nature of radiation and Matter

142073 In a photo electric effect experiment the maximum kinetic energy of the emitted electrons is $1 \mathrm{e} V$ for incoming radiation of frequency $v_{0}$ and $3 \mathrm{e} V$ for incoming radiation of frequency $3 v_{0} / 2$. What is the maximum kinetic energy of the electrons emitted for incoming radiations of frequency $9 v_{0} / 4$ ?

1 $3 \mathrm{eV}$
2 $4.5 \mathrm{eV}$
3 $6 \mathrm{eV}$
4 $9 \mathrm{eV}$
JCECE-2013
Dual nature of radiation and Matter

142081 Assertion: The energy (E) and momentum (p) of a photon are related by $\mathrm{p}=\mathrm{E} / \mathrm{c}$
Reason: The photon behaves like a particle.

1 If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
2 If both Assertion and Reason are correct but Reason in not a correct explanation of the Assertion.
3 If the Assertion is correct but Reason is incorrect.
4 If both the Assertion and Reason are incorrect.
5 If the Assertion is incorrect but the Reason is correct.
AIIMS-2005
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Dual nature of radiation and Matter

142066 A $5 \mathrm{~W}$ source emits monochromatic light of wavelength $5000 \AA$. When placed $0.5 \mathrm{~m}$ away, it liberates photoelectrons from a photosensitive metallic surface. When the source is moved to a distance of $1.0 \mathrm{~m}$, the number of photoelectrons liberated will be reduced by a factor of

1 4
2 8
3 16
4 2
UPSEE - 2007
Dual nature of radiation and Matter

142070 If e/m of electron is $1.76 \times 10^{11} \mathrm{C} \mathrm{kg}^{-1}$ and the stopping potential is $0.71 \mathrm{~V}$, then the maximum velocity of the photo-electron is

1 $150 \mathrm{kms}^{-1}$
2 $200 \mathrm{kms}^{-1}$
3 $500 \mathrm{kms}^{-1}$
4 $250 \mathrm{kms}^{-1}$
5 $100 \mathrm{kms}^{-1}$
Kerala CEE - 2011
Dual nature of radiation and Matter

142073 In a photo electric effect experiment the maximum kinetic energy of the emitted electrons is $1 \mathrm{e} V$ for incoming radiation of frequency $v_{0}$ and $3 \mathrm{e} V$ for incoming radiation of frequency $3 v_{0} / 2$. What is the maximum kinetic energy of the electrons emitted for incoming radiations of frequency $9 v_{0} / 4$ ?

1 $3 \mathrm{eV}$
2 $4.5 \mathrm{eV}$
3 $6 \mathrm{eV}$
4 $9 \mathrm{eV}$
JCECE-2013
Dual nature of radiation and Matter

142081 Assertion: The energy (E) and momentum (p) of a photon are related by $\mathrm{p}=\mathrm{E} / \mathrm{c}$
Reason: The photon behaves like a particle.

1 If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
2 If both Assertion and Reason are correct but Reason in not a correct explanation of the Assertion.
3 If the Assertion is correct but Reason is incorrect.
4 If both the Assertion and Reason are incorrect.
5 If the Assertion is incorrect but the Reason is correct.
AIIMS-2005
Join With Us for More Updates
Dual nature of radiation and Matter

142066 A $5 \mathrm{~W}$ source emits monochromatic light of wavelength $5000 \AA$. When placed $0.5 \mathrm{~m}$ away, it liberates photoelectrons from a photosensitive metallic surface. When the source is moved to a distance of $1.0 \mathrm{~m}$, the number of photoelectrons liberated will be reduced by a factor of

1 4
2 8
3 16
4 2
UPSEE - 2007
Dual nature of radiation and Matter

142070 If e/m of electron is $1.76 \times 10^{11} \mathrm{C} \mathrm{kg}^{-1}$ and the stopping potential is $0.71 \mathrm{~V}$, then the maximum velocity of the photo-electron is

1 $150 \mathrm{kms}^{-1}$
2 $200 \mathrm{kms}^{-1}$
3 $500 \mathrm{kms}^{-1}$
4 $250 \mathrm{kms}^{-1}$
5 $100 \mathrm{kms}^{-1}$
Kerala CEE - 2011
Dual nature of radiation and Matter

142073 In a photo electric effect experiment the maximum kinetic energy of the emitted electrons is $1 \mathrm{e} V$ for incoming radiation of frequency $v_{0}$ and $3 \mathrm{e} V$ for incoming radiation of frequency $3 v_{0} / 2$. What is the maximum kinetic energy of the electrons emitted for incoming radiations of frequency $9 v_{0} / 4$ ?

1 $3 \mathrm{eV}$
2 $4.5 \mathrm{eV}$
3 $6 \mathrm{eV}$
4 $9 \mathrm{eV}$
JCECE-2013
Dual nature of radiation and Matter

142081 Assertion: The energy (E) and momentum (p) of a photon are related by $\mathrm{p}=\mathrm{E} / \mathrm{c}$
Reason: The photon behaves like a particle.

1 If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
2 If both Assertion and Reason are correct but Reason in not a correct explanation of the Assertion.
3 If the Assertion is correct but Reason is incorrect.
4 If both the Assertion and Reason are incorrect.
5 If the Assertion is incorrect but the Reason is correct.
AIIMS-2005
For More Updates join with Us