AIPMT-PRELIMS Physics Nuclei Class 12 Questions

If the nuclear radius of ²⁷Al is 3.6 Fermi, the approximate nuclear radius of ⁶⁴Cu in Fermi is:

A radioactive nucleus of mass M emits a photon of frequency ν and the nucleus recoils. The recoil energy will be

The power obtained in a reactor using U²³⁵ disintegration is 1000 kW. The mass decay of U²³⁵ per hour is

Fusion reaction takes place at high temperature because

A nucleus m/nX emits one α particle and two β-particles. The resulting nucleus is

The mass of a ₃⁷Li nucleus is 0.042 u less than the sum of the masses of all its nucleons. The binding energy per nucleon of ₃⁷Li nucleus is nearly

A alpha nucleus of energy \( \frac{1}{2} mv^2 \) bombards a heavy nuclear target of charge Ze. Then the distance of closest approach for the alpha nucleus will be proportional to

In the nuclear decay given below: A^X_Z → A^{Y}_{Z+1} → A^{*}_{Z^{-1}}B → A^{*}_{Z^{-1}}B → A^{B}_{Z^{-1}}, the particles emitted in the sequence are:

The number of beta particles emitted by a radioactive substance is twice the number of alpha particles emitted by it. The resulting daughter is an:

In a Rutherford scattering experiment when a projectile of charge z₁ and mass M₁ approaches a target nucleus of charge z₂ and mass M₂, the distance of closest approach is r₀. The energy of the projectile is:

Two nuclei have their mass numbers in the ratio of 1 : 3. The ratio of their nuclear densities would be -

If M (A, Z), Mₚ and Mₙ denote the masses of the nucleus ²⁴₁₂X, proton and neutron respectively in units of u (1u = 931.5 MeV/c²) and BE represents its bonding energy in MeV, then -

In a radioactive decay process, the negatively charged emitted β-particles are

A nucleus ²⁴₁₁X has mass represented by M(A, Z). If Mₚ and Mₙ denote the mass of proton and neutron respectively and B.E. the binding energy in MeV, then

If the nucleus ²⁷₁₃Al has nuclear radius of about 3.6 fm, then ¹²⁵₅₂Te would have its radius approximately as

The binding energy of deuteron is 2.2 MeV and that of ⁴²He is 28 MeV. If two deuterons are fused to form one ⁴²He then the energy released is:

The radius of germanium (Ge) nuclide is measured to be twice the radius of ⁹⁴Be. The number of nucleons in Ge are:

In the reaction ²¹H + ³¹H → ⁴₂He + ¹₀n, if the binding energies of ²¹H, ³¹H and ⁴₂He are respectively a, b and c (in MeV), then the energy (in MeV) released in this reaction is:

Fission of nuclei is possible because the binding energy per nucleon in them:

In any fission process the ratio (mass of fission products/mass of parent nucleus) is:

If in a nuclear fusion process the masses of the fusing nuclei be m₁ and m₂ and the mass of the resultant nucleus be m₃, then

A nucleus represented by the symbol ²⁴₁₂X has :-

Mₚ denotes the mass of a proton and Mₙ that of a neutron. A given nucleus, of binding energy Bₑ, contains Z protons and N neutrons. The mass M(N, Z) of the nucleus is given by (c is velocity of light )

Solar energy is mainly caused due to :

The mass of proton is 1.0073 u and that of neutron is 1.0087 u (u = atomic mass unit). The binding energy of ²He is (Given : helium nucleus mass ≈ 4.0015 u)

The mass number of a nucleus is

A nuclear reaction given by ₆X²⁴ → ₇Y²⁴ + -₁e⁰ + ν̅ represents

A deuteron is bombarded on ₆¹⁶O nucleus then α-particle is emitted then product nucleus is -

92U²³⁵, nucleus absorb a neutron and disintegrate in 54Xe¹³⁹, 38Sr⁹⁴ and x So, What will be the product x :-

Which rays contain (+ Ve) charged particle:

X(n, α) ₃Li, then X will be:

Mₙ and Mₚ represent the mass of neutron and proton respectively. An element having mass M has N neutron and Z⁻protons, then the correct relation will be:

Energy is released in nuclear fission is due to:

For the given reaction, the particle X is: ₆C¹¹ → ₅B¹¹ + β⁺ + X

Nuclear – Fission is best explained by :