An α -particle is accelerated through a potential difference of 200V. The increase in its kinetic energy is
|
(a) 100 eV |
(b) 200 eV |
(c) 400 eV |
(d) 800 eV |
(c) 400 eV
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An object approaches a convergent lens from the left of the lens with a uniform speed 5m/s and stops at the focus. The image.
Two beams of light having intensities I and 4I interfere to produce a fringe pattern on a screen. The phase difference between the beams is 
at point A and p at point B. Then the difference between the resultant intensities at A and B is
|
(a) 2I |
(b) 4I |
(c) 5I |
(d) 7I |
Smaller pieces of heavy stones and metals which on entering earth's atmosphere burns out are
|
(a) Comets |
(b) Meteorites |
(c) Asteroids |
(d) All of these |
A capacitor of capacitance 6μF is charged upto 100 volt. The energy stored in the capacitor is
|
(a) 0.6 Joule |
(b) 0.06 Joule |
(c) 0.03 Joule |
(d) 0.3 Joule |