In Young's double slit experiment, white light is used. The separation between the slits is b. The screen is at a distance d (d>> b) from the slits. Some wavelengths are missing exactly in front of one slit. These wavelengths are
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(a) λ = |
(b) λ = |
(c) λ = |
(d) a, b |
(d) a, b
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Of the diodes shown in the following diagrams, which one is reverse biased
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(a)
|
(b)
|
(c)
|
(d)
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If refractive index of red, violet and yellow lights are 1.42, 1.62 and 1.50 respectively for a medium. Its dispersive power will be
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(a) 0.4 |
(b) 0.3 |
(c) 0.2 |
(d) 0.1 |
The resultant capacitance between A and B in the following figure is equal to
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(a) 1 μF |
(b) 3 μF |
(c) 2 μF |
(d) 1.5 μF |
The binding energy per nucleon of deuterium and helium atom is 1.1 MeV and 7.0 MeV. If two deuterium nuclei fuse to form helium atom, the energy released is
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(a) 19.2 MeV |
(b) 23.6 MeV |
(c) 26.9 MeV |
(d) 13.9 MeV |
Ultraviolet radiations of 6.2eV falls on an aluminium surface (work function 4.2 eV). The kinetic energy in joules of the fastest electron emitted is approximately
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(a) 3.2 |
(b) 3.2 |
(c) 3.2 |
(d) 3.2 |
