Parity non-conservation was established in beta-decay when it was observed that from polarised Co60 nuclei : (A) Electrons were emitted equally in all directions. (B) More electrons were emitted in direction opposite to that of magnetic field (C) Electrons were not emitted in any direction. (D) More electrons were emitted perpendicular to the direction of magnetic field.
Nuclear Fusion
Nuclear fusion is a type of nuclear reaction. In nuclear fusion, two or more than two lighter atomic nuclei combine to form a heavier nucleus. During this process, an enormous amount of energy is released. This energy is called nuclear energy. Nuclear fusion is the energy source of the sun and stars.
Fusion Bomb
A fusion bomb is also known as a thermonuclear bomb or hydrogen bomb which releases a large amount of explosive energy during a nuclear chain reaction when the lighter nuclei in it, combine to form heavier nuclei, and a large amount of radiation is released. It is an uncontrolled, self-sustaining nuclear chain reaction where isotopes of hydrogen combine under very high temperature to form helium. They work on the principle of operation of atomic fusion. The isotopes of Hydrogen are deuterium and tritium, where they combine their masses and have greater mass than the product nuclei, get heated at high temperatures, and releases energy.
Please explain all the options.
1.) Parity non-conservation was established in beta-decay when it was observed that from polarised Co60 nuclei :
(A) Electrons were emitted equally
in all directions.
(B) More electrons were emitted in
direction opposite to that of
magnetic field
(C) Electrons were not emitted in
any direction.
(D) More electrons were emitted
perpendicular to the direction of
magnetic field.
2. If the critical magnetic field for aluminum is 7.9 × 103 A/m, the critical current which can flow through long thin superconducting wire of aluminum of diameter is :
(A) 5.1 A
(B) 1.6 A
(C) 4.0 A
(D) 2.48 A
3. A satisfactory quenching gas in G.M.the tube must have the following property :
(A) Ionisation potential should be
equal to the main counting gas
in the tube
(B) Ionisation potential should be
higher than that of the main
counting gas in the tube
(C) It must have very narrow
ultraviolet absorption bands
(D) When in an excited state it
must prefer to dissociate rather
than to de-excite by the
emission of photons.
4 . Binding energy difference in mirror nuclei can be understood using Coulomb energy difference. This indicates that :
(A) Nuclear force is spin-dependent
(B) Nuclear force is strong force
(C) Nuclear force is as strong as
Coulomb force
(D) Nuclear force is a charge
independent
5. Deviation from Rutherford scattering formula for beta-particle scattering gives an estimate of :
(A) size of an atom
(B) thickness of target
(C) size of a nucleus
(D) half life of beta-emitter
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