The source of energy of stars is nuclear fusion. Fusion reaction occurs at very high temperature, about `10^(7) `. Energy released in the process of fusion is due to mass defect. It is also called `Q`-value. `Q = Delta mc^(2), Delta m =` mass defect. The binding energy per nucleon of `._(1)H^(2)` and `._(2)He^(4)` are `1.1 MeV` and `7 MeV`, respectively. If two deuteron nuclei react to form a single helium nucleus, then the energy released isA. `13.9 MeV`B. `26.9 MeV`C. `23.6 MeV`D. `19.3 MeV`

The source of energy of stars is nuclear fusion. Fusion reaction occur

1.	The source of energy of stars is nuclear fusion. Fusion reaction occurs at very high temperature, about `10^(7) `. Energy released in the process of fusion is due to mass defect. It is also called `Q`-value. `Q = Delta mc^(2), Delta m =` mass defect. The binding energy per nucleon of `._(1)H^(2)` and `._(2)He^(4)` are `1.1 MeV` and `7 MeV`, respectively. If two deuteron nuclei react to form a single helium nucleus, then the energy released isA. `13.9 MeV`B. `26.9 MeV`C. `23.6 MeV`D. `19.3 MeV`
Answer» Correct Answer - C `E = Delta m xx 931 MeV`, where `Delta m =` mass defect

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