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

142129 A point source of light is placed at a distance of $0.5 \mathrm{~m}$ from a caesium photocell and under saturation conditions the number of emitted photoelectrons is $n$. If the source is now placed $1 \mathrm{~m}$ from the cell, the number of emitted electrons will be

1 $2 \mathrm{n}$
2 $\mathrm{n}$
3 $\frac{\mathrm{n}}{2}$
4 $\frac{\mathrm{n}}{4}$
UP CPMT-2002
Dual nature of radiation and Matter

142130 The kinetic energy of an electron is $5 \mathrm{eV}$. The de Broglie wavelength associated with it
$\left(\mathrm{h}=\mathbf{6 . 6} \times 10^{-34} \mathrm{~J} \mathrm{~s}, \mathrm{~m}_{\mathrm{e}}=\mathbf{9 . 1} \times 10^{-31} \mathrm{~kg}\right)$ is

1 $5.47 \AA$
2 $10.9 \AA$
3 $2.7 \AA$
4 none of these
SRMJEEE - 2013
Dual nature of radiation and Matter

142131 A photon of wavelength $6630 \AA$ is incident on a totally reflecting surface. The momentum delivered by the photon is equal to

1 $6.63 \times 10^{-27} \mathrm{~kg} \mathrm{~m} / \mathrm{s}$
2 $2 \times 10^{-27} \mathrm{~kg} \mathrm{~m} / \mathrm{s}$
3 $3.33 \times 10^{-27} \mathrm{~kg} \mathrm{~m} / \mathrm{s}$
4 $10^{-27} \mathrm{~kg} \mathrm{~m} / \mathrm{s}$
SRMJEEE - 2007
Dual nature of radiation and Matter

142135 The light rays having photons of energy $4.2 \mathrm{eV}$ are falling on a metal surface having a work function of $2.2 \mathrm{eV}$. The stopping potential of the surface is:

1 $2 \mathrm{eV}$
2 $2 \mathrm{~V}$
3 $1.1 \mathrm{~V}$
4 $6.4 \mathrm{~V}$
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Dual nature of radiation and Matter

142129 A point source of light is placed at a distance of $0.5 \mathrm{~m}$ from a caesium photocell and under saturation conditions the number of emitted photoelectrons is $n$. If the source is now placed $1 \mathrm{~m}$ from the cell, the number of emitted electrons will be

1 $2 \mathrm{n}$
2 $\mathrm{n}$
3 $\frac{\mathrm{n}}{2}$
4 $\frac{\mathrm{n}}{4}$
UP CPMT-2002
Dual nature of radiation and Matter

142130 The kinetic energy of an electron is $5 \mathrm{eV}$. The de Broglie wavelength associated with it
$\left(\mathrm{h}=\mathbf{6 . 6} \times 10^{-34} \mathrm{~J} \mathrm{~s}, \mathrm{~m}_{\mathrm{e}}=\mathbf{9 . 1} \times 10^{-31} \mathrm{~kg}\right)$ is

1 $5.47 \AA$
2 $10.9 \AA$
3 $2.7 \AA$
4 none of these
SRMJEEE - 2013
Dual nature of radiation and Matter

142131 A photon of wavelength $6630 \AA$ is incident on a totally reflecting surface. The momentum delivered by the photon is equal to

1 $6.63 \times 10^{-27} \mathrm{~kg} \mathrm{~m} / \mathrm{s}$
2 $2 \times 10^{-27} \mathrm{~kg} \mathrm{~m} / \mathrm{s}$
3 $3.33 \times 10^{-27} \mathrm{~kg} \mathrm{~m} / \mathrm{s}$
4 $10^{-27} \mathrm{~kg} \mathrm{~m} / \mathrm{s}$
SRMJEEE - 2007
Dual nature of radiation and Matter

142135 The light rays having photons of energy $4.2 \mathrm{eV}$ are falling on a metal surface having a work function of $2.2 \mathrm{eV}$. The stopping potential of the surface is:

1 $2 \mathrm{eV}$
2 $2 \mathrm{~V}$
3 $1.1 \mathrm{~V}$
4 $6.4 \mathrm{~V}$
NEET DIGITAL LIBRARY
Dual nature of radiation and Matter

142129 A point source of light is placed at a distance of $0.5 \mathrm{~m}$ from a caesium photocell and under saturation conditions the number of emitted photoelectrons is $n$. If the source is now placed $1 \mathrm{~m}$ from the cell, the number of emitted electrons will be

1 $2 \mathrm{n}$
2 $\mathrm{n}$
3 $\frac{\mathrm{n}}{2}$
4 $\frac{\mathrm{n}}{4}$
UP CPMT-2002
Dual nature of radiation and Matter

142130 The kinetic energy of an electron is $5 \mathrm{eV}$. The de Broglie wavelength associated with it
$\left(\mathrm{h}=\mathbf{6 . 6} \times 10^{-34} \mathrm{~J} \mathrm{~s}, \mathrm{~m}_{\mathrm{e}}=\mathbf{9 . 1} \times 10^{-31} \mathrm{~kg}\right)$ is

1 $5.47 \AA$
2 $10.9 \AA$
3 $2.7 \AA$
4 none of these
SRMJEEE - 2013
Dual nature of radiation and Matter

142131 A photon of wavelength $6630 \AA$ is incident on a totally reflecting surface. The momentum delivered by the photon is equal to

1 $6.63 \times 10^{-27} \mathrm{~kg} \mathrm{~m} / \mathrm{s}$
2 $2 \times 10^{-27} \mathrm{~kg} \mathrm{~m} / \mathrm{s}$
3 $3.33 \times 10^{-27} \mathrm{~kg} \mathrm{~m} / \mathrm{s}$
4 $10^{-27} \mathrm{~kg} \mathrm{~m} / \mathrm{s}$
SRMJEEE - 2007
Dual nature of radiation and Matter

142135 The light rays having photons of energy $4.2 \mathrm{eV}$ are falling on a metal surface having a work function of $2.2 \mathrm{eV}$. The stopping potential of the surface is:

1 $2 \mathrm{eV}$
2 $2 \mathrm{~V}$
3 $1.1 \mathrm{~V}$
4 $6.4 \mathrm{~V}$
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Dual nature of radiation and Matter

142129 A point source of light is placed at a distance of $0.5 \mathrm{~m}$ from a caesium photocell and under saturation conditions the number of emitted photoelectrons is $n$. If the source is now placed $1 \mathrm{~m}$ from the cell, the number of emitted electrons will be

1 $2 \mathrm{n}$
2 $\mathrm{n}$
3 $\frac{\mathrm{n}}{2}$
4 $\frac{\mathrm{n}}{4}$
UP CPMT-2002
Dual nature of radiation and Matter

142130 The kinetic energy of an electron is $5 \mathrm{eV}$. The de Broglie wavelength associated with it
$\left(\mathrm{h}=\mathbf{6 . 6} \times 10^{-34} \mathrm{~J} \mathrm{~s}, \mathrm{~m}_{\mathrm{e}}=\mathbf{9 . 1} \times 10^{-31} \mathrm{~kg}\right)$ is

1 $5.47 \AA$
2 $10.9 \AA$
3 $2.7 \AA$
4 none of these
SRMJEEE - 2013
Dual nature of radiation and Matter

142131 A photon of wavelength $6630 \AA$ is incident on a totally reflecting surface. The momentum delivered by the photon is equal to

1 $6.63 \times 10^{-27} \mathrm{~kg} \mathrm{~m} / \mathrm{s}$
2 $2 \times 10^{-27} \mathrm{~kg} \mathrm{~m} / \mathrm{s}$
3 $3.33 \times 10^{-27} \mathrm{~kg} \mathrm{~m} / \mathrm{s}$
4 $10^{-27} \mathrm{~kg} \mathrm{~m} / \mathrm{s}$
SRMJEEE - 2007
Dual nature of radiation and Matter

142135 The light rays having photons of energy $4.2 \mathrm{eV}$ are falling on a metal surface having a work function of $2.2 \mathrm{eV}$. The stopping potential of the surface is:

1 $2 \mathrm{eV}$
2 $2 \mathrm{~V}$
3 $1.1 \mathrm{~V}$
4 $6.4 \mathrm{~V}$
For More Updates join with Us
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