- AChemical reaction
- BElastic reaction
- CThermonuclear reaction
- DPhotonuclear reaction
Explanation:
In nuclear physics,nuclear fusion is a nuclear reaction in which two or more atomic nuclei collide at very high speed and join to form a new type of atomic nucleus. During this process matter is not conserved because some of the matter of fusing nuclei is converted to photons also known as thermonuclear reaction.
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Work of moderator is
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(a) To control the velocity of neutrons |
(b) Cooling |
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(c) As fuel |
(d) It is used for safety |
A glass lens is placed in a medium in which it is found to behave like a glass plate. Refractive index of the medium will be
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(a) Greater than the refractive index of glass |
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(b) Smaller than the refractive index of glass |
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(c) Equal to refractive index of glass |
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(d) No case will be possible from above |
In a transformer, the coefficient of mutual inductance between the primary and the secondary coil is 0.2 henry. When the current changes by 5 ampere/second in the primary, the induced e.m.f. in the secondary will be
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(a) 5 V |
(b) 1 V |
(c) 25 V |
(d) 10 V |
The electric charge in uniform motion produces
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(a) An electric field only |
(b) A magnetic field only |
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(c) Both electric and magnetic field |
(d) Neither electric nor magnetic field |
Assertion : Penetrating power of X-rays increases with the increasing the wavelength.
Reason : The penetrating power of X-rays increases with the frequency of X-rays.
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(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
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(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
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(c) If assertion is true but reason is false. |
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(d) If assertion is false but reason is true. |
Light from the constellation Virgo is observed to increase in wavelength by 0.4%. With respect to Earth the constellation is
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(a) Moving away with velocity 1.2 × 106 m/s |
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(b) Coming closer with velocity 1.2 × 106 m/s |
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(c) Moving away with velocity 4 × 106 m/s |
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(d) Coming closer with velocity 4 × 106 m/s |