Fusion reaction is initiated with the help of 
(a) Low temperature         (b) High temperature
(c) Neutrons                     (d) Any particle

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Mass-energy equivalent
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When a Be94 atom is bombarded with α particles, one of the product of nuclear transmutation is C126. The other is 
(a) e0-1            (b) H11
(c) D21             (d) n10

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During the nuclear fusion reaction 
(a) A heavy nucleus breaks into two fragments by itself
(b) A light nucleus bombarded by thermal neutrons breaks up
(c) A heavy nucleus bombarded by thermal neutrons breaks up
(d) Two light nuclei combine to give a heavier nucleus and
possibly other products

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The main source of solar energy is

(a) Fission reactions (b) Fusion reactions
(c) Chemical reactions (d) Combustion reactions

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A gamma ray photon creates an electron- positron pair. If the rest mass energy of an electron is 0.5 MeV and the total K.E. of the electron- positron pair is 0.78 MeV, then the energy of the gamma ray photon must be 
(a) 0.78 MeV                  (b) 1.78 MeV
(c) 1.28 MeV                  (d) 0.28 MeV

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Which of the following statement is true 
(a) Pt19278 has 78 neutrons
(b) Po21484Pb21082+β-
(c) U23892Th23490+He42
(d) Th23490Pa23491+He42

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Types of decay
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Fast neutrons can easily be slowed down by 
(a) The use of lead shielding
(b) Passing them through water
(c) Elastic collisions with heavy nuclei
(d) Applying a strong electric field

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Nuclear reactor
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When U23592 undergoes fission, 0.1% of its original mass is changed into energy. How much energy is released if 1kg of U23592 undergoes fission

(a) 9×1010 J            (b)  9×1011 J
(c) 9×1012 J            (d) 9×1013 J

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γ-rays radiation can be used to create electron-positron pair. In this process of pair production, γ-rays energy cannot be less than 
(a) 5.0 MeV                (b) 4.02 MeV
(c) 15.0 MeV               (d) 1.02 MeV

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A reaction between a proton and O188 that produces F189 must also liberate 
(a) n10         (b) e01
(c) n01         (d) e10

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