The correct decreasing order of atomic radii (pm) of Li, Be, B and C is:
1. Be > Li > B > C
2. Li > Be > B > C
3. C > B > Be > Li
4. Li > C > Be > B
Subtopic: Atomic Size |
82%
Level 1: 80%+
NEET - 2024
Hints
The magnetic moment and moment of inertia of a magnetic needle as shown are, respectively, \(1.0\times10^{-2}~\text{A m}^{2}~\text{and}~\frac{10^{-6}}{\pi^{2}}~\text{kg m}^{2}.\) If it completes \(10\) oscillations in \(10~\text s,\) the magnitude of the magnetic field is:
1. \(0.4~\text T\)
2. \(4~\text T\)
3. \(0.4~\text{mT}\)
4. \(4~\text{mT}\)
1. \(0.4~\text T\)
2. \(4~\text T\)
3. \(0.4~\text{mT}\)
4. \(4~\text{mT}\)
Subtopic: Bar Magnet |
79%
Level 2: 60%+
NEET - 2024
Hints
The capacitance of a capacitor with charge \(q\) and a potential difference \(V\) depends on:
| 1. | both \(q\) and \(V\) | 2. | the geometry of the capacitor |
| 3. | \(q\) only | 4. | \(V\) only |
Subtopic: Capacitance |
74%
Level 2: 60%+
NEET - 2024
Hints
Given below are two statements:
| Statement I: | Image formation needs regular reflection and/or refraction. |
| Statement II: | The variety in colour of objects we see around us is due to the constituent colours of the light incident on them. |
| 1. | Statement I is correct but Statement II is incorrect. |
| 2. | Statement I is incorrect but Statement II is correct. |
| 3. | Both Statement I and Statement II are correct. |
| 4. | Both Statement I and Statement II are incorrect. |
Subtopic: Reflection at Plane Surface |
63%
Level 2: 60%+
NEET - 2024
Hints
A uniform metal wire of length \(l\) has \(10~\Omega \) resistance. Now this wire is stretched to a length \(2l\) and then bent to form a perfect circle. The equivalent resistance across any arbitrary diameter of that circle is:
| 1. | \(10~\Omega \) | 2. | \(5~\Omega \) |
| 3. | \(40~\Omega \) | 4. | \(20~\Omega \) |
Subtopic: Current & Current Density |
50%
Level 3: 35%-60%
NEET - 2024
Hints
The spectral series which corresponds to the electronic transition from the levels \({n}_{2}=5,6,\ldots \) to the level \({n}_{1}=4\mathrm~\) is:
| 1. | Pfund series | 2. | Brackett series |
| 3. | Lyman series | 4. | Balmer series |
Subtopic: Spectral Series |
81%
Level 1: 80%+
NEET - 2024
Hints
Given below are two statements:
Choose the correct option from the given ones:
| Assertion (A): | Houses made of concrete roofs overlaid with foam keep the room hotter during summer. |
| Reason (R): | The layer of foam insulation prohibits heat transfer, as it contains air pockets. |
Choose the correct option from the given ones:
| 1. | (A) is True but (R) is False. |
| 2. | (A) is False but (R) is True. |
| 3. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 4. | Both (A) and (R) are True and (R) is the correct explanation of (R). |
Subtopic: Conduction |
61%
Level 2: 60%+
NEET - 2024
Hints
A particle executing simple harmonic motion with amplitude \(A\) has the same potential and kinetic energies at the displacement:
| 1. | \(2\sqrt{A}\) | 2. | \(\dfrac{A}{2}\) |
| 3. | \(\dfrac{\mathrm{A}}{\sqrt{2}}\) | 4. | \(A\sqrt{2}\) |
Subtopic: Energy of SHM |
80%
Level 1: 80%+
NEET - 2024
Hints
Two slits in Young's double slit experiment are \(1.5~\text{mm}\) apart and the screen is placed at a distance of \(1 ~\text m\) from the slits. If the wavelength of light used is \(600\times10^{-9}~\text {m}\) then the fringe separation is:
1. \(4\times10^{-5}~\text m\)
2. \(9\times10^{-8}~\text m\)
3. \(4\times10^{-7}~\text m\)
4. \(4\times10^{-4}~\text m\)
1. \(4\times10^{-5}~\text m\)
2. \(9\times10^{-8}~\text m\)
3. \(4\times10^{-7}~\text m\)
4. \(4\times10^{-4}~\text m\)
Subtopic: Young's Double Slit Experiment |
77%
Level 2: 60%+
NEET - 2024
Hints
Water is used as a coolant in a nuclear reactor because of its:
1. high thermal expansion coefficient
2. high specific heat capacity
3. low density
4. low boiling point
1. high thermal expansion coefficient
2. high specific heat capacity
3. low density
4. low boiling point
Subtopic: Nuclear Binding Energy |
70%
Level 2: 60%+
NEET - 2024
Hints
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