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Physics |
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| 311)When electrons come to lower energy state they emit light which can be observed in | |||
| Emission Spectra | Absorption spectra | ||
| Fluorescence spectra | Raman spectra | ||
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| 312)Neutrons are slowed down in a niclear reactor by | |||
| Controll rods | Cooling system | ||
| Moderator | Fissionable material | ||
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| 313)The sub-atomic particle having no mass and no charge but only spin is | |||
| Meson | Neutrino | ||
| Electron | Neutron | ||
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| 314)In the resistance colour code the fourth bands signifies | |||
| Power of ten | Tolerance level | ||
| Material of the resistence | Total value of the resistance | ||
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| 315)Which of the following is the measure of inertia? | |||
| Velocity | Weight | ||
| Mass | Accleration | ||
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| 316)The hypothetical hole in astrophysics from which stars and energy emerge is | |||
| Black hole | White hole | ||
| Ozone hole | Asteroid belt | ||
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| 317)A stireed liquid comes to rest due to | |||
| Surface tension | Density | ||
| Gravitation | Viscosity | ||
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| 318)A substance which is good absorber of heat is also a | |||
| Good radiator | Good reflector | ||
| Bad radiator | Bad reflector | ||
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| 319)A body moving with uniform speed | |||
| may have uniform velocity | can not have uniform velocity | ||
| must have uniform velocity | will have no velocity | ||
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| 320)The rainbow formation in the sky is primarily due to | |||
| Refraction of sunlight | Total internal reflection of sunlight | ||
| Dispersion of sunlight | Reflection of sunlight | ||
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321)With respect to X-ray which of the following statements is/are correct?
A. They can penetrate through a thin sheet of aluminium B. They produce heat when absorbed by matter C. They are generated by fast moving electron strike a metal target. |
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| A only | C only | ||
| B and C | A, B and C | ||
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| 322)The material which is weakly repelled by a magnet is called | |||
| Dia-magnetic material | Magnetic material | ||
| Ferro- magnetic material | Para- magnetic material | ||
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| 323)The evidence that suggest that the universe is expanding is | |||
| Occurance of supernova explosions | Red shift phenomenon in space | ||
| Detection of microwaves in space | Movement of asteroid in space | ||
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| 324)A person will feel himself heavier in a lift when it | |||
| is moving down | is moving up | ||
| Just begins to move up | Descends freely | ||
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| 325)A swinging pendulum will have maximum accleration at | |||
| the bottom of the swing | every point of the swing | ||
| the two extreme ends | none of these | ||
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