Question

Assertion (A): Nuclear fusion reactions are considered as thermos-nuclear reactions Reason (R): The source of stellar energy is nuclear fusion
A. Both A & R are true and R is the correct explanation of A
B. Both A & R are true and R is not correct explanation of A
C. A is true but r is false
D. A is false but R is true

Answer 1

Nuclear fusion reactions occur when two atomic nuclei are located to form one different atomic nuclei. Potential energy lamer for such a reaction is high.

Complete step by step answer:
Let us explain this question by considering the example of SUN.
In sum, two hydrogen atoms continue together to form one Helium atom. This reaction is called nuclear fusion reaction because it happens due to the fusion of the nuclei of hydrogen atoms. Compression of this reaction releases energy. Or in simple terms, we call it the right energy. How, let us observe some facts.
Since, with the nuclei of hydrogen atoms will repel each other under normal conditions, this reaction is not positive without some external help. But if the two nuclei are vibrating at such a large speed that they could collide with each other by overcoming the force of repulsion that they have, then only this reaction is positive. We know that heat increases the vibrations in nuclei. That means if enough heat is provided, then nuclear fusion reaction is possible. In the Sun, the temperature is too high which becomes favorable for the nuclear fusion reaction. Since, the theorem means heat, and we have just explained that heat is extremely important for nuclear fusion reaction. We can come to a conclusion that Nuclear fusion reactions are considered as theorem-nuclear reactions. Also, the energy radiated from the sun or any other star due to the nuclear fusion reaction can say that the source of stellar energy is nuclear fusion. Therefore, our reason is also true. But, the cause of nuclear fusion reaction can be the energy radiated after nuclear fusion reaction.
Therefore, reason (R) is not the correct explanation of assertion (A).
Hence, the correct option is (B). Both A & R are true and R is not the correct explanation of A.

Note: Nuclear fusion reaction requires very high temperature, in nucleons and kelvin, which is not possible to create under any artificial conditions on earth. That is the reason that we drive not hence due to tap into the infinite source of energy that we can get through under fusion.