This set of Physics Multiple Choice Questions & Answers (MCQs) focuses on “Atomic Masses and Composition of Nucleus”.

1. The neutron was discovered by whom?
a) Marie Curie
b) Pierre Curie
c) Rutherford
d) James Chadwick
View Answer

2. The magnetic moment of a revolving electron around the nucleus varies with the principal quantum number as which of the following?
a) μ ∝ n
b) μ ∝ $\frac {1}{n}$
c) μ ∝ n²
d) μ ∝ $\frac {1}{n^2}$
View Answer

3. Which of the following has the highest neutron ratio?
a) ₈O¹⁶
b) ₂He⁴
c) ₂₆Fe⁵⁶
d) ₉₂U²³⁵
View Answer

4. When a radioactive substance emits an α-particle, its position in the periodic table is lowered by which of the following?
a) One place
b) Two places
c) Three places
d) Four places
View Answer

5. If alpha, beta, and gamma rays carry the same momentum, which has the longest wavelength?
a) Alpha rays
b) Beta rays
c) Gamma rays
d) All have the same wavelength
View Answer

6. β-rays emitted from radioactive material are known as electromagnetic radiation.
a) True
b) False
View Answer

7. If elements with principal quantum number n > 4 were not allowed in nature, then what will be the number of possible elements?
a) 60
b) 20
c) 4
d) 64
View Answer

8. For uranium nucleus how does its mass vary with volume?
a) m ∝ V
b) m ∝ $\frac {1}{V}$
c) m ∝ √V
d) m ∝ V²
View Answer

9. Which of the following is a correct statement?
a) Beta rays are the same as for cathode rays
b) Gamma rays are high energy neutrons
c) Alpha particles are singly ionized helium atoms
d) Protons and neutrons have the same mass
View Answer

10. Which is a non-central force?
a) Electrostatic force
b) Nuclear force
c) Gravitational force
d) Spring force
View Answer

Sanfoundry Global Education & Learning Series – Physics – Class 12.

To practice all areas of Physics, here is complete set of 1000+ Multiple Choice Questions and Answers.