Solve the following.
The half-life of radium is $1550$ years. Calculate its disintegration constant ($\lambda$).
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Nuclei - ISC Class 12 Physics Questions with Answers, Page 3
52 past-paper questions on Nuclei from ISC Class 12 Physics papers (2027-2018), newest first, in full. Questions 41-52 are on this page, 20 to a page. Tap "Show answer" under a question to see its answer.
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Answer the following.
What is meant by mass defect?
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Answer the following.
Nuclear fission
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Answer in one word.
Name a material which is used in making control rods in a nuclear reactor.
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Answer the following.
What is meant by ‘binding energy per nucleon’ of a nucleus? State its physical significance.
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Choose the correct option.
Half Life of a certain radioactive substance is $69\cdot3$ days. Its disintegration constant is:
- (a)$0\cdot010\text{ day}^{-1}$
- (b)$0\cdot100\text{ day}^{-1}$
- (c)$0\cdot001\text{ day}^{-1}$
- (d)$1\cdot00\text{ day}^{-1}$
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Answer in one word.
Name any one material used as a moderator in a nuclear reactor.
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Answer the following.
Emission of $\beta^-$ (i.e. a negative beta particle)
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Answer the following.
What is meant by the terms half-life of a radioactive substance and binding energy of a nucleus?
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Derive the following.
For radioactive disintegration of a radioactive substance, show that
$N = N_0 e^{-\lambda t}$
where the terms have their usual meaning.
To show: $N = N_0 e^{-\lambda t}$
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Answer the following.
What is meant by pair annihilation? Write a balanced equation for the same.
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Answer the following.
Nuclear fusion
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