Q. No.Which, of the following particles, is least absorbed by matter (i.e., interacts least) as it passes through?
1. \(\alpha\)-rays
2. \(\beta\)-rays
3. \(\gamma\)-rays
4. neutrinos
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1. \(\alpha\)-decay
2. \(\beta\)-decay
3. \(\gamma\)-emission
4. neutron-emission
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| 1. | kinetic energy | 2. | mass |
| 3. | momentum | 4. | all the above |
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| 1. | mass number |
| 2. | proton number |
| 3. | neutron number |
| 4. | density of the nucleus |
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1. \(N+P\)
2. \((N+P)^{1/3}\)
3. \((N+P)^{2/3}\)
4. \((N+P)^{-1/3}\)
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| 1. | \(1~\alpha\)-decay followed by \(1~\beta\)-decay |
| 2. | \(1~\beta\)-decay followed by \(2~\alpha\)-decays |
| 3. | \(1~\alpha\)-decay followed by \(2~\beta\)-decays |
| 4. | none of the above |
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| 1. | \(p\rightarrow n+e^+\) |
| 2. | \(n\rightarrow p+e^-\) |
| 3. | \(p\rightarrow n+e^++\nu_e\) |
| 4. | \(n\rightarrow p+e^-+\bar{\nu_e}\) |
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| 1. | \(_2\mathrm{He}^4\) | 2. | \(_3\mathrm{Li}^8\) |
| 3. | \(_4\mathrm{Be}^8\) | 4. | \(_8\mathrm{O}^{16}\) |
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Let, the nuclear radii of \(X,Y,Z\) be \(r_{_X},r_{_Y},r_{_Z}.\) Then, which of the following, is (nearly) correct?
| 1. | \(r_{_X}=r_{_Y}+r_{_Z}\) | 2. | \(\Large\frac{1}{r_{_X}}=\frac{1}{r_{_Y}}+\frac{1}{r_{_Z}}\) |
| 3. | \(r_{_X}=|r_{_Y}-r_{_Z}|\) | 4. | \(r_{_X}^3=r^3_{_Y}+r^3_{_Z}\) |
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1. Number of neutrons
2. Number of protons
3. Number of electrons
4. All of the above
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