Target Exam

CUET

Subject

Physics

Chapter

Nuclei

Question:

The mass number of helium is 4 and that of sulphur is 32. How many times the radius of sulphur nucleus is bigger than that of helium?

Options:

8

4

2

$2 \sqrt{2}$

Correct Answer:

2

Explanation:

The correct answer is Option (3) → 2

The radius 'r' of a Nucleus -

$r∝A^{1/3}$

$∴\frac{r_s}{r_{He}}=\left(\frac{32}{4}\right)^{1/3}=8^{1/3}=2$