Einstein s Photo Electric Equation and Energy Quantity Of Radiation (KE, Vmax, Work Function)
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Dual nature of radiation and Matter

142187 A monochromatic light of wavelength $\lambda$ ejects photoelectrons from a metal surface with work function $(\phi) 2.4 \mathrm{eV}$. These photoelectrons are made to collide with hydrogen atoms in ground state. The maximum value of $\lambda$ for which hydrogen atom may be ionised is [take, hc = $1240 \mathrm{eV}-\mathrm{nm}$ ]

1 $80 \mathrm{~nm}$
2 $77.5 \mathrm{~nm}$
3 $75.5 \mathrm{~nm}$
4 $85 \mathrm{~nm}$
Shift-2
Dual nature of radiation and Matter

142188 According to the photoelectric effect, the plot of 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 radiation
2 depends only on the intensity of radiation
3 depends both on the intensity of the radiation and the metal used
4 depends on the nature of metals used
TS-EAMCET-14.09.2020
Dual nature of radiation and Matter

142189 Find the energy of incident radiation for which electrons are emitted with a velocity of $2.5 \times$ $10^{6} \mathrm{~m} . \mathrm{s}^{-1}$. Given the work function of incident surface is $1.8 \mathrm{eV}$.

1 $1.937 \mathrm{eV}$
2 $2 \mathrm{eV}$
3 $19.57 \mathrm{eV}$
4 $20.1 \mathrm{eV}$
Shift-II
Dual nature of radiation and Matter

142190 The work function of photoelectric material is 3.3 eV. The threshold frequency for such material will be

1 $8 \times 10^{14} \mathrm{~Hz}$
2 $8 \times 10^{10} \mathrm{~Hz}$
3 $5 \times 10^{20} \mathrm{~Hz}$
4 $4 \times 10^{14} \mathrm{~Hz}$
Shift-I
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Dual nature of radiation and Matter

142187 A monochromatic light of wavelength $\lambda$ ejects photoelectrons from a metal surface with work function $(\phi) 2.4 \mathrm{eV}$. These photoelectrons are made to collide with hydrogen atoms in ground state. The maximum value of $\lambda$ for which hydrogen atom may be ionised is [take, hc = $1240 \mathrm{eV}-\mathrm{nm}$ ]

1 $80 \mathrm{~nm}$
2 $77.5 \mathrm{~nm}$
3 $75.5 \mathrm{~nm}$
4 $85 \mathrm{~nm}$
Shift-2
Dual nature of radiation and Matter

142188 According to the photoelectric effect, the plot of 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 radiation
2 depends only on the intensity of radiation
3 depends both on the intensity of the radiation and the metal used
4 depends on the nature of metals used
TS-EAMCET-14.09.2020
Dual nature of radiation and Matter

142189 Find the energy of incident radiation for which electrons are emitted with a velocity of $2.5 \times$ $10^{6} \mathrm{~m} . \mathrm{s}^{-1}$. Given the work function of incident surface is $1.8 \mathrm{eV}$.

1 $1.937 \mathrm{eV}$
2 $2 \mathrm{eV}$
3 $19.57 \mathrm{eV}$
4 $20.1 \mathrm{eV}$
Shift-II
Dual nature of radiation and Matter

142190 The work function of photoelectric material is 3.3 eV. The threshold frequency for such material will be

1 $8 \times 10^{14} \mathrm{~Hz}$
2 $8 \times 10^{10} \mathrm{~Hz}$
3 $5 \times 10^{20} \mathrm{~Hz}$
4 $4 \times 10^{14} \mathrm{~Hz}$
Shift-I
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Dual nature of radiation and Matter

142187 A monochromatic light of wavelength $\lambda$ ejects photoelectrons from a metal surface with work function $(\phi) 2.4 \mathrm{eV}$. These photoelectrons are made to collide with hydrogen atoms in ground state. The maximum value of $\lambda$ for which hydrogen atom may be ionised is [take, hc = $1240 \mathrm{eV}-\mathrm{nm}$ ]

1 $80 \mathrm{~nm}$
2 $77.5 \mathrm{~nm}$
3 $75.5 \mathrm{~nm}$
4 $85 \mathrm{~nm}$
Shift-2
Dual nature of radiation and Matter

142188 According to the photoelectric effect, the plot of 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 radiation
2 depends only on the intensity of radiation
3 depends both on the intensity of the radiation and the metal used
4 depends on the nature of metals used
TS-EAMCET-14.09.2020
Dual nature of radiation and Matter

142189 Find the energy of incident radiation for which electrons are emitted with a velocity of $2.5 \times$ $10^{6} \mathrm{~m} . \mathrm{s}^{-1}$. Given the work function of incident surface is $1.8 \mathrm{eV}$.

1 $1.937 \mathrm{eV}$
2 $2 \mathrm{eV}$
3 $19.57 \mathrm{eV}$
4 $20.1 \mathrm{eV}$
Shift-II
Dual nature of radiation and Matter

142190 The work function of photoelectric material is 3.3 eV. The threshold frequency for such material will be

1 $8 \times 10^{14} \mathrm{~Hz}$
2 $8 \times 10^{10} \mathrm{~Hz}$
3 $5 \times 10^{20} \mathrm{~Hz}$
4 $4 \times 10^{14} \mathrm{~Hz}$
Shift-I
For More Updates join with Us
NEET Test Series from KOTA - 10 Papers In MS WORD WhatsApp Here
Dual nature of radiation and Matter

142187 A monochromatic light of wavelength $\lambda$ ejects photoelectrons from a metal surface with work function $(\phi) 2.4 \mathrm{eV}$. These photoelectrons are made to collide with hydrogen atoms in ground state. The maximum value of $\lambda$ for which hydrogen atom may be ionised is [take, hc = $1240 \mathrm{eV}-\mathrm{nm}$ ]

1 $80 \mathrm{~nm}$
2 $77.5 \mathrm{~nm}$
3 $75.5 \mathrm{~nm}$
4 $85 \mathrm{~nm}$
Shift-2
Dual nature of radiation and Matter

142188 According to the photoelectric effect, the plot of 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 radiation
2 depends only on the intensity of radiation
3 depends both on the intensity of the radiation and the metal used
4 depends on the nature of metals used
TS-EAMCET-14.09.2020
Dual nature of radiation and Matter

142189 Find the energy of incident radiation for which electrons are emitted with a velocity of $2.5 \times$ $10^{6} \mathrm{~m} . \mathrm{s}^{-1}$. Given the work function of incident surface is $1.8 \mathrm{eV}$.

1 $1.937 \mathrm{eV}$
2 $2 \mathrm{eV}$
3 $19.57 \mathrm{eV}$
4 $20.1 \mathrm{eV}$
Shift-II
Dual nature of radiation and Matter

142190 The work function of photoelectric material is 3.3 eV. The threshold frequency for such material will be

1 $8 \times 10^{14} \mathrm{~Hz}$
2 $8 \times 10^{10} \mathrm{~Hz}$
3 $5 \times 10^{20} \mathrm{~Hz}$
4 $4 \times 10^{14} \mathrm{~Hz}$
Shift-I