Three identical capacitors are combined differently. For the same voltage to each combination, the one that stores the greatest energy is
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(a) Two in parallel and the third in series with it |
(b) Three in series |
|
(c) Three in parallel |
(d) Two in series and third in parallel with it |
(c) Three in parallel
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The de-Broglie wavelength of a neutron at 27oC is l. What will be its wavelength at 927oC
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(a) l / 2 |
(b) l / 3 |
(c) l / 4 |
(d) l / 9 |
Out of gravitational, electromagnetic, Vander Waals, electrostatic and nuclear forces; which two are able to provide an attractive force between two neutrons
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(a) Electrostatic and gravitational |
|
(b) Electrostatic and nuclear |
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(c) Gravitational and nuclear |
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(d) Some other forces like Vander Waals |
Light of wavelength 5000 Å falls on a sensitive plate with photoelectric work function of 1.9 eV. The kinetic energy of the photoelectron emitted will be
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(a) 0.58 eV |
(b) 2.48 eV |
(c) 1.24 eV |
(d) 1.16 eV |
The mass of a neutron is the same as that of
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(a) A proton |
(b) A meson |
(c) An epsilon |
(d) An electron |
When light falls on a metal surface, the maximum kinetic energy of the emitted photo-electrons depends upon
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(a) The time for which light falls on the metal |
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(b) Frequency of the incident light |
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(c) Intensity of the incident light |
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(d) Velocity of the incident light |