
Barn is the unit of nuclear cross section. It is equal to:
A.
B.
C.
D.
Answer
493.2k+ views
Hint: Recall the basics of nuclear cross section. We can guess that the unit of nuclear cross section is meter square in the SI system of units as the nuclear cross section refers to the area of the nucleus. Check the actual value of the area of nucleus or value of one barn in the SI system of units.
Complete step by step answer:
We have given that the unit of nuclear cross section is a barn.
The value of 1 barn is equal to which is equal to the approximate area of the nucleus in an atom.
So, the correct answer is “Option B”.
Additional Information:
The nuclear cross section of a nucleus gives the information about the probability that a nuclear reaction will occur in the nucleus of an atom.
If the nuclear cross section is more then the probability of the nuclear reaction to occur in the nucleus increases.
The nuclear cross section of a nucleus gives the area of the nucleus.
We know that the radius of the nucleus is . Therefore, the area of the nucleus should be of the order of .
Note:
The students may get confused between the value of one barn or area of nucleus in an atom in the SI system of units and CGS system of units. The value of one barn in the SI system on units is and the value of one barn in the CGS system of units is . Hence, the students should perfectly keep in mind the value of one barn in different systems of units.
Complete step by step answer:
We have given that the unit of nuclear cross section is a barn.
The value of 1 barn is equal to
So, the correct answer is “Option B”.
Additional Information:
The nuclear cross section of a nucleus gives the information about the probability that a nuclear reaction will occur in the nucleus of an atom.
If the nuclear cross section is more then the probability of the nuclear reaction to occur in the nucleus increases.
The nuclear cross section of a nucleus gives the area of the nucleus.
We know that the radius of the nucleus is
Note:
The students may get confused between the value of one barn or area of nucleus in an atom in the SI system of units and CGS system of units. The value of one barn in the SI system on units is
Latest Vedantu courses for you
Grade 11 Science PCM | CBSE | SCHOOL | English
CBSE (2025-26)
School Full course for CBSE students
₹41,848 per year
EMI starts from ₹3,487.34 per month
Recently Updated Pages
Master Class 12 Economics: Engaging Questions & Answers for Success

Master Class 12 Maths: Engaging Questions & Answers for Success

Master Class 12 Biology: Engaging Questions & Answers for Success

Master Class 12 Physics: Engaging Questions & Answers for Success

Master Class 12 Business Studies: Engaging Questions & Answers for Success

Master Class 12 English: Engaging Questions & Answers for Success

Trending doubts
Which one of the following is a true fish A Jellyfish class 12 biology CBSE

Mirage is a phenomena due to A Refraction of light class 12 physics CBSE

How is democracy better than other forms of government class 12 social science CBSE

What is Nutrition Explain Diff Type of Nutrition ?

Which of the following lanthanoid ions is diamagnetic class 12 chemistry CBSE

What is the difference between Latitude and Longit class 12 physics CBSE
