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Q. No.A hydrogen ion and a singly ionised helium atom are accelerated from rest through the same potential difference. The ratio of their final speeds is close to:
| 1. | \(1:2\) | 2. | \(10:7\) |
| 3. | \(5:7\) | 4. | \(2:1\) |
Subtopic: Â Various Atomic Models |
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JEE
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\(\sqrt {d_1}\) and \(\sqrt {d_2}\) are the impact parameters corresponding to scattering angles \(60^{\circ}\) and \(90^{\circ}\) respectively, when an \(\alpha\) particle is approaching a gold nucleus. For \(d_1 = xd_2\), the value of \(x\) will be:
1. \(2\)
2. \(3\)
3. \(4\)
4. \(5\)
1. \(2\)
2. \(3\)
3. \(4\)
4. \(5\)
Subtopic: Â Various Atomic Models |
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The magnetic moment of an electron \((e)\) revolving in an orbit around nucleus with an orbital angular momentum \(\vec{L}\) is given by:
1. \(\vec\mu_{L}=\frac{{e \vec {L}}}{2{m}} \)
2. \(\vec\mu_{L}=-\frac{{e \vec {L}}}{2 {m}} \)
3. \(\vec\mu_{L}=-\frac{{e \vec {L}}}{{m}} \)
4. \(\vec {{\mu}_{L}}=\frac{2 {e \vec {L}}}{{m}}\)
1. \(\vec\mu_{L}=\frac{{e \vec {L}}}{2{m}} \)
2. \(\vec\mu_{L}=-\frac{{e \vec {L}}}{2 {m}} \)
3. \(\vec\mu_{L}=-\frac{{e \vec {L}}}{{m}} \)
4. \(\vec {{\mu}_{L}}=\frac{2 {e \vec {L}}}{{m}}\)
Subtopic: Â Various Atomic Models |
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Q. No.
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