142096
In photoelectric effect if the intensity of light is doubled, then maximum kinetic energy of photoelectrons will become
1 double
2 half
3 four times
4 no change
Explanation:
D In photoelectric effect if the intensity of light is doubled, then maximum kinetic energy of photoelectrons will become constant because photoelectrons does not depends upon intensity of light.
MHT-CET 2009
Dual nature of radiation and Matter
142100
Suppose a beam of electrons with each electron having energy $E_{0}$ incident on a metal surface kept in an evacuated chamber. Then,
1 electrons can be emitted with any energy with a maximum of $\mathrm{E}_{0}$
2 no electrons will be emitted as only photons can emit electrons
3 electrons can be emitted but all with an energy $\mathrm{E}_{0}$
4 electrons can be emitted with any energy with a maximum of $\mathrm{E}_{0}-\phi$,where $\phi$ being work function
Explanation:
A When a beam of electron of energy $E_{o}$ is incident on a metal surface kept in an evacuated chamber, electrons can be emitted with maximum energy $\mathrm{E}_{\mathrm{o}}$ (due to elastic collision) and with any energy less than $\mathrm{E}_{0}$, when part of incident energy of electron is used in liberating the electrons from the surface of metal.
VITEEE-2015
Dual nature of radiation and Matter
142102
A metallic surface ejects electrons. When exposed to green light of intensity I but no photoelectrons are emitted, when exposed to yellow light of intensity $I$. It is possible to eject electron from the same surface by
1 yellow light of same intensity which is more than I
2 green light of any intensity
3 red light of any intensity
4 None of the above
Explanation:
A The energy of photons incident on the surface depend on the frequency, $\mathrm{E} \propto \frac{1}{\lambda}$ Frequency of yellow and red light is less than that of green light so they can't eject photoelectrons.
VITEEE-2014
Dual nature of radiation and Matter
142107
Continuous emission spectrum is produced by:
1 incandescent electric lamp
2 mercury vapour lamp
3 sodium vapour lamp
4 polyatomic substances
Explanation:
A Incandescent electric lamp produces continuous emission spectrum whereas mercury and sodium vapour give line emission spectrum. Polyatomic substances such as $\mathrm{H}_{2}, \mathrm{CO}_{2}$ and $\mathrm{KMnO}_{4}$ produces band absorption spectrum.
142096
In photoelectric effect if the intensity of light is doubled, then maximum kinetic energy of photoelectrons will become
1 double
2 half
3 four times
4 no change
Explanation:
D In photoelectric effect if the intensity of light is doubled, then maximum kinetic energy of photoelectrons will become constant because photoelectrons does not depends upon intensity of light.
MHT-CET 2009
Dual nature of radiation and Matter
142100
Suppose a beam of electrons with each electron having energy $E_{0}$ incident on a metal surface kept in an evacuated chamber. Then,
1 electrons can be emitted with any energy with a maximum of $\mathrm{E}_{0}$
2 no electrons will be emitted as only photons can emit electrons
3 electrons can be emitted but all with an energy $\mathrm{E}_{0}$
4 electrons can be emitted with any energy with a maximum of $\mathrm{E}_{0}-\phi$,where $\phi$ being work function
Explanation:
A When a beam of electron of energy $E_{o}$ is incident on a metal surface kept in an evacuated chamber, electrons can be emitted with maximum energy $\mathrm{E}_{\mathrm{o}}$ (due to elastic collision) and with any energy less than $\mathrm{E}_{0}$, when part of incident energy of electron is used in liberating the electrons from the surface of metal.
VITEEE-2015
Dual nature of radiation and Matter
142102
A metallic surface ejects electrons. When exposed to green light of intensity I but no photoelectrons are emitted, when exposed to yellow light of intensity $I$. It is possible to eject electron from the same surface by
1 yellow light of same intensity which is more than I
2 green light of any intensity
3 red light of any intensity
4 None of the above
Explanation:
A The energy of photons incident on the surface depend on the frequency, $\mathrm{E} \propto \frac{1}{\lambda}$ Frequency of yellow and red light is less than that of green light so they can't eject photoelectrons.
VITEEE-2014
Dual nature of radiation and Matter
142107
Continuous emission spectrum is produced by:
1 incandescent electric lamp
2 mercury vapour lamp
3 sodium vapour lamp
4 polyatomic substances
Explanation:
A Incandescent electric lamp produces continuous emission spectrum whereas mercury and sodium vapour give line emission spectrum. Polyatomic substances such as $\mathrm{H}_{2}, \mathrm{CO}_{2}$ and $\mathrm{KMnO}_{4}$ produces band absorption spectrum.
142096
In photoelectric effect if the intensity of light is doubled, then maximum kinetic energy of photoelectrons will become
1 double
2 half
3 four times
4 no change
Explanation:
D In photoelectric effect if the intensity of light is doubled, then maximum kinetic energy of photoelectrons will become constant because photoelectrons does not depends upon intensity of light.
MHT-CET 2009
Dual nature of radiation and Matter
142100
Suppose a beam of electrons with each electron having energy $E_{0}$ incident on a metal surface kept in an evacuated chamber. Then,
1 electrons can be emitted with any energy with a maximum of $\mathrm{E}_{0}$
2 no electrons will be emitted as only photons can emit electrons
3 electrons can be emitted but all with an energy $\mathrm{E}_{0}$
4 electrons can be emitted with any energy with a maximum of $\mathrm{E}_{0}-\phi$,where $\phi$ being work function
Explanation:
A When a beam of electron of energy $E_{o}$ is incident on a metal surface kept in an evacuated chamber, electrons can be emitted with maximum energy $\mathrm{E}_{\mathrm{o}}$ (due to elastic collision) and with any energy less than $\mathrm{E}_{0}$, when part of incident energy of electron is used in liberating the electrons from the surface of metal.
VITEEE-2015
Dual nature of radiation and Matter
142102
A metallic surface ejects electrons. When exposed to green light of intensity I but no photoelectrons are emitted, when exposed to yellow light of intensity $I$. It is possible to eject electron from the same surface by
1 yellow light of same intensity which is more than I
2 green light of any intensity
3 red light of any intensity
4 None of the above
Explanation:
A The energy of photons incident on the surface depend on the frequency, $\mathrm{E} \propto \frac{1}{\lambda}$ Frequency of yellow and red light is less than that of green light so they can't eject photoelectrons.
VITEEE-2014
Dual nature of radiation and Matter
142107
Continuous emission spectrum is produced by:
1 incandescent electric lamp
2 mercury vapour lamp
3 sodium vapour lamp
4 polyatomic substances
Explanation:
A Incandescent electric lamp produces continuous emission spectrum whereas mercury and sodium vapour give line emission spectrum. Polyatomic substances such as $\mathrm{H}_{2}, \mathrm{CO}_{2}$ and $\mathrm{KMnO}_{4}$ produces band absorption spectrum.
142096
In photoelectric effect if the intensity of light is doubled, then maximum kinetic energy of photoelectrons will become
1 double
2 half
3 four times
4 no change
Explanation:
D In photoelectric effect if the intensity of light is doubled, then maximum kinetic energy of photoelectrons will become constant because photoelectrons does not depends upon intensity of light.
MHT-CET 2009
Dual nature of radiation and Matter
142100
Suppose a beam of electrons with each electron having energy $E_{0}$ incident on a metal surface kept in an evacuated chamber. Then,
1 electrons can be emitted with any energy with a maximum of $\mathrm{E}_{0}$
2 no electrons will be emitted as only photons can emit electrons
3 electrons can be emitted but all with an energy $\mathrm{E}_{0}$
4 electrons can be emitted with any energy with a maximum of $\mathrm{E}_{0}-\phi$,where $\phi$ being work function
Explanation:
A When a beam of electron of energy $E_{o}$ is incident on a metal surface kept in an evacuated chamber, electrons can be emitted with maximum energy $\mathrm{E}_{\mathrm{o}}$ (due to elastic collision) and with any energy less than $\mathrm{E}_{0}$, when part of incident energy of electron is used in liberating the electrons from the surface of metal.
VITEEE-2015
Dual nature of radiation and Matter
142102
A metallic surface ejects electrons. When exposed to green light of intensity I but no photoelectrons are emitted, when exposed to yellow light of intensity $I$. It is possible to eject electron from the same surface by
1 yellow light of same intensity which is more than I
2 green light of any intensity
3 red light of any intensity
4 None of the above
Explanation:
A The energy of photons incident on the surface depend on the frequency, $\mathrm{E} \propto \frac{1}{\lambda}$ Frequency of yellow and red light is less than that of green light so they can't eject photoelectrons.
VITEEE-2014
Dual nature of radiation and Matter
142107
Continuous emission spectrum is produced by:
1 incandescent electric lamp
2 mercury vapour lamp
3 sodium vapour lamp
4 polyatomic substances
Explanation:
A Incandescent electric lamp produces continuous emission spectrum whereas mercury and sodium vapour give line emission spectrum. Polyatomic substances such as $\mathrm{H}_{2}, \mathrm{CO}_{2}$ and $\mathrm{KMnO}_{4}$ produces band absorption spectrum.
