- AThree
- ✓Four
- CFive
- DSeven
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Assertion : In photoelectric effect, on increasing the intensity of light, both the number of electrons emitted and kinetic energy of each of them get increased but photoelectric current remains unchanged.
Reason : The photoelectric current depends only on wavelength of light.
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(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
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(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
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(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
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(d) If the assertion and reason both are false. |
In beta decay
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(a) The parent and daughter nuclei have same number of protons |
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(b) The daughter nucleus has one proton less than the parent nucleus |
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(c) The daughter nucleus has one proton more than the parent nucleus |
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(d) The daughter nucleus has one neutron more than the parent nucleus |
When a dielectric material is introduced between the plates of a charged condenser then electric field between the plates
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(a) Decreases |
(b) Increases |
(c) Remain constant |
(d) First (b) then (a) |
In the given figure, potential difference between A and B is
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(a) 0 |
(b) 5 volt |
(c) 10 volt |
(d) 15 volt |
Gauss’s law should be invalid if
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(a) There were magnetic monopoles |
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(b) The inverse square law were not exactly true |
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(c) The velocity of light were not a universal constant |
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(d) None of these |
X-rays of
have frequency
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(a) 3 |
(b) 3 |
(c) |
(d) |