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Nuclear (General Science) Solved Questions & Notes (2026) - Apex Rankers

General Competitive Exams > General Science > Nuclear

3 Total Solved Questions
~5 mins Estimated Reading Time
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Nuclear

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Q. 1 General Knowledge
Difficulty: Easy (1 Mark)
In an atomic nucleus, protons and neutrons are held together by:
A
Coulombic forces
B
Gravitational forces
C
Exchange forces
✓ Correct
D
Magnetic forces
💡 Step-by-Step Explanation & Concept Rationale
The strong nuclear force, mediated by the exchange of mesons, holds the nucleus together despite electrostatic repulsion.
Q. 2 General Knowledge
Difficulty: Easy (1 Mark)
A moderator is used in nuclear Reactors in order to:
A
Slow down the speed of the neutrons
✓ Correct
B
Accelerate the neutrons
C
Increase the number of neutrons
D
Decrease the number of neutrons
💡 Step-by-Step Explanation & Concept Rationale
Moderators like heavy water or graphite slow fast neutrons to "thermal" speeds to sustain the fission reaction.
Q. 3 General Knowledge
Difficulty: Easy (1 Mark)
Neutron was discovered by:
A
Otto Hahn
B
Enrcico Fermi
C
Lise Meitner
D
James Chadwick
✓ Correct
💡 Step-by-Step Explanation & Concept Rationale
James Chadwick was awarded the Nobel Prize in Physics for his 1932 discovery of the neutron.
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