Q. No.In the Davison and Germer experiment, the velocity of electrons emitted from the electron gun can be increased by
1. increasing the filament current
2. decreasing the filament current
3. decreasing the potential difference between the anode and filament
4. increasing the potential difference between the anode and filament
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A radioactive nucleus of mass M emits a photon of frequency and the nucleus will recoil. The recoil energy will be
1.
2. zero
3.
4.
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1. \(1.3\) V
2. \(0.5\) V
3. \(2.3\) V
4. \(1.8\) V
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1. 1:2
2. 1:1
3. 1:5
4. 1:4
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| 1. | decrease by \(2\) times |
| 2. | decrease by \(4\) times |
| 3. | increase by \(4\) times |
| 4. | increase by \(2\) times |
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| 1. | \(1.00\) | 2. | \(1.02\) |
| 3. | \(1.04\) | 4. | \(0.98\) |
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The potential difference that must be applied to stop the fastest photoelectrons emitted by a nickel surface, having work function 5.01 eV, when ultraviolet light of 200 nm falls on it, must be
1. 2.4 V
2. -1.2 V
3. -2.4 V
4. 1.2 V
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2. 3 X 1016
3. 9 x 1015
4. 3 X 1019
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2. Curves a and b represent incident radiations of the same frequency but of different intensities
3. Curves b and c represent incident radiations of different frequencies and different intensities
4. Curves b and c represent incident radiations of same frequency having the same intensity
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2. threshold frequency (0)
3. intensity of light
4. frequency of light ()
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