Question
Wave nature of light is verified by
|
(a) Interference |
(b) Photoelectric effect |
(c) Reflection |
(d) Refraction |
Wave nature of light is verified by
|
(a) Interference |
(b) Photoelectric effect |
(c) Reflection |
(d) Refraction |
(a) Interference
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The maximum wavelength of radiation that can produce photoelectric effect in a certain metal is 200 nm. The maximum kinetic energy acquired by electron due to radiation of wavelength 100 nm will be
|
(a) 12.4 eV |
(b) 6.2 eV |
(c) 100 eV |
(d) 200 eV |
Two insulated metallic spheres of 3 μF and 5 μF capacitances are charged to 300 V and 500V respectively. The energy loss, when they are connected by a wire is
|
(a) 0.012 J |
(b) 0.0218 J |
(c) 0.0375 J |
(d) 3.75 J |
A parallel plate capacitor having a plate separation of 2 mm is charged by connecting it to a 300 V supply. The energy density is
|
(a) 0.01 J/m3 |
(b) 0.1 J/m3 |
(c) 1.0 J/m3 |
(d) 10 J/m3 |
In a certain charge distribution, all points having zero potential can be joined by a circle S. Points inside S have positive potential and points outside S have negative potential. A positive charge, which is free to move, is placed inside S
|
(a) It will remain in equilibrium |
|
(b) It can move inside S, but it cannot cross S |
|
(c) It must cross S at some time |
|
(d) It may move, but will ultimately return to its starting point |
In Young's double slit experiment, the distance between the slits is 1 mm and that between slit and screen is 1 meter and 10th fringe is 5 mm away from the central bright fringe, then wavelength of light used will be
|
(a) 5000 Å |
(b) 6000 Å |
(c) 7000 Å |
(d) 8000 Å |