# NEET Physics Nuclei Questions Solved

BOARD

Write two characteristic properties of nuclear force. How does one explain the release of energy in the processes of nuclear fusion and nuclear fission ?                                        (3 marks)

(a)  (i) Strong force

(ii) short range

(iii) charge independence

(iv) spin dependence

[Note : Any two characteristic properties]

(b)    Explanation :

In the case of fussion of two very light nuclei forming a heavier nucleus, the B.E./A of heavier

nucleus is more than that of light nuclei. The difference causing the release of energy. (1 marks)

In fission, a heavy nucleus has lower binding enegry compared to that of nuclei with lower

mass number. When a nucleus with $\mathrm{A}=240$ breaks into two of $\mathrm{A}=120$ each, nuclei get more

tightly bound, causing the release of energy.                                         (1 marks)

Difficulty Level:

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