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Q. No.Solar energy is mainly caused due to:
1.
burning of hydrogen in the oxygen
2.
fission of uranium present in the sun
3.
fusion of protons during synthesis of heavier elements
4.
gravitational contraction
Subtopic: Nuclear Energy |
75%
Level 2: 60%+
AIPMT - 2003
Hints
The volume occupied by an atom is greater than the volume of the nucleus by a factor of about:
1. \(10\)
2. \(10^5\)
3. \(10^{10}\)
4. \(10^{15}\)
Subtopic: Mass-Energy Equivalent |
64%
Level 2: 60%+
AIPMT - 2003
Hints
Links
Which of the following rays are not electromagnetic waves?
1. \({X}\text-\)rays
2. \(\gamma\text-\)rays
3. \(\beta\text-\)rays
4. Heat rays
1. \({X}\text-\)rays
2. \(\gamma\text-\)rays
3. \(\beta\text-\)rays
4. Heat rays
Subtopic: Types of Decay |
59%
Level 3: 35%-60%
AIPMT - 2003
Hints
The mass of a proton is \(1.0073\) u and that of a neutron is \(1.0087\) u (u = atomic mass unit). The binding energy of \({}_{2}^{4}\mathrm{He}\) is: (Given: helium nucleus mass ≈ \(4.0015\) u)
| 1. | \(0.0305\) J | 2. | \(0.0305\) erg |
| 3. | \(28.4\) MeV | 4. | \(0.061\) u |
Subtopic: Nuclear Binding Energy |
77%
Level 2: 60%+
AIPMT - 2003
Hints
The mass number of a nucleus is:
| 1. | always less than its atomic number. |
| 2. | always more than its atomic number. |
| 3. | sometimes equal to its atomic number. |
| 4. | sometimes less than and sometimes more than its atomic number. |
Subtopic: Nuclear Binding Energy |
56%
Level 3: 35%-60%
AIPMT - 2003
Hints
A nuclear reaction is given by;
\({}_{Z}^{A}\mathrm{X}\rightarrow {}_{Z+1}^{A}\mathrm{Y}+{}_{-1}^{0}\mathrm{e}+\nu\)
represents:
1. \(\beta\text-\)decay
2. \(\gamma\text-\)decay
3. fusion
4. fission
\({}_{Z}^{A}\mathrm{X}\rightarrow {}_{Z+1}^{A}\mathrm{Y}+{}_{-1}^{0}\mathrm{e}+\nu\)
represents:
1. \(\beta\text-\)decay
2. \(\gamma\text-\)decay
3. fusion
4. fission
Subtopic: Types of Decay |
92%
Level 1: 80%+
AIPMT - 2003
Hints
If a \({}_{a}^{b}\mathrm{X}\) species emits firstly a positron, then two \(\alpha\) and two \(\beta\) and at last one \(\alpha\) is also emitted and finally converted into stable \({}_{d}^{c}\mathrm{Y}\) species, so the correct relation will be:
1. \(c = b-12, d = a-5\)
2. \(a = c-8, d = b-1\)
3. \(a = c-6, d = b-0\)
4. \(a = c-4, a = b-2\)
Subtopic: Types of Decay |
81%
Level 1: 80%+
AIPMT - 2001
Hints
The energy released in nuclear fission is due to:
| 1. | some mass is converted into energy |
| 2. | the total binding energy of fragments is more than the B.E of the parental element |
| 3. | total B.E of fragments is less than the B.E of parental element |
| 4. | total B.E of fragments is equal to the B.E of parental element |
Subtopic: Nuclear Energy |
68%
Level 2: 60%+
AIPMT - 2001
Hints
\(M_n~\text{and}~M_p\) represent the mass of the neutron and proton respectively. An element having mass \(M\) has \(N\) neutrons and \(Z\)-protons, then the correct relation will be:
1. \(M <\left \{N.M_n+Z.M_p \right \}\)
2. \(M >\left \{N.M_n+Z.M_p \right \}\)
3. \(M =\left \{N.M_n+Z.M_p \right \}\)
4. \(M =N\left \{M_n+M_p \right \}\)
1. \(M <\left \{N.M_n+Z.M_p \right \}\)
2. \(M >\left \{N.M_n+Z.M_p \right \}\)
3. \(M =\left \{N.M_n+Z.M_p \right \}\)
4. \(M =N\left \{M_n+M_p \right \}\)
Subtopic: Nuclear Binding Energy |
83%
Level 1: 80%+
AIPMT - 2001
Hints
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