Nuclei Practice Questions
Class 12 · Physics · 2464 free MCQs with instant results and detailed explanations.
2464
Total
829
Easy
1226
Medium
409
Hard
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Topics in Nuclei
Nuclear Fission and Fusion
751
Mass-Energy Equivalence
429
Radioactivity
599
Nuclear Force
685
Sample Questions from Nuclei
Here are 10 sample questions. Start a quiz to get randomized questions with scoring.
Q1
Easy
Which of the following best describes the nuclear force?
A.
It is a long-range force acting between nucleons.
B.
It is a short-range force that binds protons and neutrons.
C.
It is a gravitational force between nucleons.
D.
It is a centrifugal force experienced by nucleons.
Show Answer & Explanation
Correct Answer: B
The nuclear force is a short-range force that primarily binds protons and neutrons together in the nucleus, overcoming the electrostatic repulsion between protons.
Q2
Easy
If the nuclear force between two protons in a nucleus is 10^-13 N, what can be inferred about the strength of this force compared to gravitational force?
A.
Nuclear force is weaker than gravitational force.
B.
Nuclear force is stronger than gravitational force.
C.
Nuclear force is equal to gravitational force.
D.
Nuclear force has no relation to gravitational force.
Show Answer & Explanation
Correct Answer: B
The nuclear force is significantly stronger than the gravitational force; for example, the force of gravity between two protons is many orders of magnitude weaker than the nuclear force.
Q3
Easy
In a certain nucleus, the total number of nucleons is 12, and it contains 6 protons. What is the nuclear force primarily responsible for?
A.
Binding only protons together.
B.
Binding neutrons to protons and other neutrons.
C.
Attracting nucleons toward the nucleus center only.
D.
Repelling neutrons from each other.
Show Answer & Explanation
Correct Answer: B
The nuclear force is responsible for binding both protons to neutrons and neutrons together, ensuring the stability of the nucleus.
Q4
Medium
What is the range of the strong nuclear force?
A.
10^-15 m
B.
10^-10 m
C.
10^-12 m
D.
10^-18 m
Show Answer & Explanation
Correct Answer: A
The strong nuclear force operates at a very short range, approximately 1 femtometer (10^-15 m).
Q5
Medium
Which particles experience the strong nuclear force?
A.
Electrons
B.
Neutrons
C.
Photons
D.
All of the above
Show Answer & Explanation
Correct Answer: B
The strong nuclear force acts between nucleons (protons and neutrons) but does not act on electrons or photons.
Q6
Medium
What is the primary role of the strong nuclear force in atomic nuclei?
A.
Binding protons and electrons
B.
Binding neutrons and electrons
C.
Binding protons and neutrons
D.
Repelling neutrons
Show Answer & Explanation
Correct Answer: C
The strong nuclear force is essential for binding protons and neutrons together in the nucleus, countering their repulsive electromagnetic force.
Q7
Medium
How does the strong nuclear force differ in its behavior at short versus long ranges?
A.
Stronger at long range
B.
Weaker at short range
C.
Only acts at short range
D.
Acts equally at all ranges
Show Answer & Explanation
Correct Answer: C
The strong nuclear force is effective only at short ranges, becoming negligible at distances greater than 2.5 femtometers.
Q8
Hard
What is the range of the strong nuclear force?
A.
10^-15 m
B.
10^-12 m
C.
10^-10 m
D.
10^-9 m
Show Answer & Explanation
Correct Answer: A
The strong nuclear force has a range of about 1 femtometer (10^-15 m), effective only at the scale of atomic nuclei.
Q9
Hard
Which particle is primarily responsible for mediating the strong nuclear force?
A.
Photon
B.
Gluon
C.
W boson
D.
Z boson
Show Answer & Explanation
Correct Answer: B
Gluons are the exchange particles (or force carriers) that mediate the strong nuclear force between quarks.
Q10
Hard
Which of the following is true about the strong nuclear force?
A.
It is a long-range force.
B.
It is independent of charge.
C.
It only acts between protons.
D.
It is weaker than the electromagnetic force.
Show Answer & Explanation
Correct Answer: B
The strong nuclear force is charge-independent and acts between all nucleons (protons and neutrons), making it unique compared to other forces.
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Nuclei — Class 12 Physics Practice Questions Online
This page contains 2464 practice MCQs for the chapter Nuclei in Class 12 Physics. The questions are organized by difficulty — 829 easy, 1226 medium, 409 hard — so you can choose the right level for your preparation.
Every question includes a detailed explanation to help you understand the concept, not just memorize answers. Take a timed quiz to simulate exam conditions, or practice at your own pace with no time limit. This chapter covers 4 topics, giving you comprehensive coverage of the entire chapter.