Which of the following is true for number of spectral lines in going from Lyman series
Which of the following is true for number of spectral lines in going from Lyman series to Pfund series? Options…
7 years ago
Atoms and Nuclei
Moderator used in nuclear reactor is
Moderator used in nuclear reactor is Options (a) Ice (b) Boron rods (c) Cadmium rods (d) Heavy water Correct Answer:…
7 years ago
An electron of a stationary hydrogen atom passes from the fifth energy level to
An electron of a stationary hydrogen atom passes from the fifth energy level to the ground level. The velocity that…
7 years ago
An electron in the hydrogen atom jumps from excited state n to the ground state
An electron in the hydrogen atom jumps from excited state n to the ground state. The wavelength so emitted illuminates…
7 years ago
An electron in hydrogen atom makes a transition n₁ → n₂
An electron in hydrogen atom makes a transition n₁ → n₂ where n₁ and n₂ are principal quantum number of…
7 years ago
An alpha nucleus of energy 1/2 mv² bombards a heavy nuclear target of charge Ze
An alpha nucleus of energy 1/2 mv² bombards a heavy nuclear target of charge Ze. Then the distance of closest…
7 years ago
A certain mass of Hydrogen is changed to Helium by the process of fusion
A certain mass of Hydrogen is changed to Helium by the process of fusion. The mass defect in fusion reaction…
7 years ago
α- particles, β – particles and γ – rays are all having same energy.
α- particles, β - particles and γ - rays are all having same energy. Their penetrating power in a given…
7 years ago
If an electron and a positron annihilate, the energy released is
If an electron and a positron annihilate, the energy released is Options (a) 3.2x10⁻¹³ J (b) 1.6x10⁻¹³ J (c) 4.8x10⁻¹³…
7 years ago
A nucleus at rest splits into two nuclear parts having radii in the ratio 1:2.
A nucleus at rest splits into two nuclear parts having radii in the ratio 1:2. Their velocities are in the…
7 years ago