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The process by which a heavy nucleus splits into light nuclei is known as
|
(a) Fission |
(b) α- decay |
(c) Fusion |
(d) Chain reaction |
A combination of two thin lenses of the same material with focal lengths 
and 
, arranged on a common axis minimizes chromatic aberration, if the distance between them is
|
(a) |
(b) |
(c) ( |
(d) |
Light of wavelength 589.3 nm is incident normally on the slit of width 0.1 mm. What will be the angular width of the central diffraction maximum at a distance of 1 m from the slit
|
(a) 0.68° |
(b) 1.02° |
(c) 0.34° |
(d) None of these |
The true statement is, on increasing the distance between the plates of a parallel plate condenser
|
(a) The electric intensity between the plates will decrease |
|
(b) The electric intensity between the plates will increase |
|
(c) The electric intensity between the plates will remain unchanged |
|
(d) The P.D. between the plates will decrease |
A particle has a mass 400 times than that of the electron and charge is double than that of a electron. It is accelerated by 5V of potential difference. Initially the particle was at rest, then its final kinetic energy will be
|
(a) 5 eV |
(b) 10 eV |
(c) 100 eV |
(d) 2000 eV |
A steady current i is flowing through a conductor of uniform cross-section. Any segment of the conductor has
|
(a) Zero charge |
(b) Only positive charge |
|
(c) Only negative charge |
(d) Charge proportional to current i |
Three fourth of the active decays in a radioactive sample in 3/4 sec. The half life of the sample is
|
(a) |
(b) 1 sec |
(c) |
(d) |
