A sheet is placed on a horizontal surface in front of a strong magnetic pole. A force is needed to:
A.
hold the sheet there if it is magnetic.
B.
hold the sheet there if it is non-magnetic.
C.
move the sheet away from the pole with uniform velocity if it is conducting.
D.
move the sheet away from the pole with uniform velocity if it is both, non-conducting and non-polar.
Choose the correct statement\((\mathrm s )\) from the options given below:
1.
A and C only
2.
A, C and D only
3.
C only
4.
B and D only
Subtopic: Magnetic Materials |
55%
Level 3: 35%-60%
NEET - 2024
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If the plates of a parallel plate capacitor connected to a battery are moved closer to each other, then:
Choose the most appropriate answer from the options given below:
| (A) | The charge stored in it increases. |
| (B) | The energy stored in it decreases. |
| (C) | Its capacitance increases. |
| (D) | The ratio of charge to its potential remains the same. |
| (E) | The product of charge and voltage increases. |
| 1. | (A), (C) and (E) only |
| 2. | (B), (D) and (E) only |
| 3. | (A), (B) and (C) only |
| 4. | (A), (B) and (E) only |
Subtopic: Energy stored in Capacitor |
61%
Level 2: 60%+
NEET - 2024
Hints
The following graph represents the \(T\text -V\) curves of an ideal gas (where \(T\) is the temperature and \(V\) the volume) at three pressures \(P_1, P_2\) and \(P_3\) compared with those of Charles's law represented as dotted lines.
Then the correct relation is:
Then the correct relation is:
| 1. | \(P_1>P_3>P_2 \) | 2. | \(P_2>P_1>P_3 \) |
| 3. | \( P_1>P_2>P_3\) | 4. | \(P_3 > P_2>P_1\) |
Subtopic: Ideal Gas Equation |
68%
Level 2: 60%+
NEET - 2024
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The property which is not of an electromagnetic wave travelling in free space is that:
| 1. | the energy density in electric field is equal to energy density in magnetic field. |
| 2. | they travel with a speed equal to \(\dfrac{1}{\sqrt{\mu_0~ \varepsilon_0}} .\) |
| 3. | they originate from charges moving with uniform speed. |
| 4. | they are transverse in nature. |
Subtopic: Properties of EM Waves |
68%
Level 2: 60%+
NEET - 2024
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An iron bar of length \( L\) has a magnetic moment \(M.\) It is bent at the middle of its length such that the two arms make an angle \(60^\circ\) with each other. The magnetic moment of this new magnet is:
| 1. | \(\dfrac{M}{2}\) | 2. | \({2 M}\) |
| 3. | \(\dfrac{{M}}{\sqrt{3}}\) | 4. | \(M\) |
Subtopic: Bar Magnet |
54%
Level 3: 35%-60%
NEET - 2024
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If the mass of a bob in a simple pendulum is increased to thrice its original mass and its length is made half its original length, then the new time period of oscillation is \( \dfrac{x}{2}\) times its original time period. The value of \(x\) is:
| 1. | \(\sqrt2\) | 2. | \(2\sqrt3\) |
| 3. | \(4\) | 4. | \(\sqrt3\) |
Subtopic: Angular SHM |
69%
Level 2: 60%+
NEET - 2024
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The reagents with which glucose does not react to give the corresponding test/products are:
A. Tollen's reagent
B. Schiff's reagent
C. \(\text{HCN}\)
D. \(\text{NH}_2\text{OH}\)
E. \(\text{NaHSO}_3\)
Choose the correct option:
A. Tollen's reagent
B. Schiff's reagent
C. \(\text{HCN}\)
D. \(\text{NH}_2\text{OH}\)
E. \(\text{NaHSO}_3\)
Choose the correct option:
| 1. | \(\text{A}\) and \(\text{D}\) | 2. | \(\text{B}\) and \(\text{E}\) |
| 3. | \(\text{E}\) and \(\text{D}\) | 4. | \(\text{B}\) and \(\text{C}\) |
Subtopic: Carbohydrates - Classification & D-L configuration |
71%
Level 2: 60%+
NEET - 2024
Hints
The energy of electron in the ground state \((\text{n}=1)\) for \(\text{He}^+\) ion is \(\text{-x}J,\) then that for an electron in \(\text{n}=2\) state for \(\text{Be}^{3+}\) ion in \(\text{J}\) is :
| 1. | \(-\dfrac x9\) | 2. | \(-4x\) |
| 3. | \(-\dfrac 49x\) | 4. | \(-x\) |
Subtopic: Bohr's Theory |
66%
Level 2: 60%+
NEET - 2024
Hints
Which reaction is NOT a redox reaction?
1. \(2 \mathrm{KClO}_3+\mathrm{I}_2 \rightarrow 2 \mathrm{KIO}_3+\mathrm{Cl}_2\)
2. \(\mathrm{H}_2+\mathrm{Cl}_2 \rightarrow 2 \mathrm{HCl}\)
3. \(\mathrm{BaCl}_2+\mathrm{Na}_2 \mathrm{SO}_4 \rightarrow \mathrm{BaSO}_4+2 \mathrm{NaCl}\)
4. \(\mathrm{Zn}+\mathrm{CuSO}_4 \rightarrow \mathrm{ZnSO}_4+\mathrm{Cu}\)
1. \(2 \mathrm{KClO}_3+\mathrm{I}_2 \rightarrow 2 \mathrm{KIO}_3+\mathrm{Cl}_2\)
2. \(\mathrm{H}_2+\mathrm{Cl}_2 \rightarrow 2 \mathrm{HCl}\)
3. \(\mathrm{BaCl}_2+\mathrm{Na}_2 \mathrm{SO}_4 \rightarrow \mathrm{BaSO}_4+2 \mathrm{NaCl}\)
4. \(\mathrm{Zn}+\mathrm{CuSO}_4 \rightarrow \mathrm{ZnSO}_4+\mathrm{Cu}\)
Subtopic: Introduction to Redox and Oxidation Number |
67%
Level 2: 60%+
NEET - 2024
Hints
Match List I with List II.
Choose the correct answer from the options given below:
| List-I (Process) | List-II (Conditions) | ||
| A. | Isothermal process | I. | No heat exchange |
| B. | Isochoric process | II. | Carried out at constant temperature |
| C. | Isobaric process | III. | Carried out at constant volume |
| D. | Adiabatic process | IV. | Carried out at constant pressure |
| 1. | \(\text { A-IV, B-II, C-III, D-I }\) | 2. | \(\text { A-I, B-II, C-III, D-IV }\) |
| 3. | \(\text { A-II, B-III, C-IV, D-I }\) | 4. | \(\text { A-IV, B-III, C-II, D-I }\) |
Subtopic: Thermodynamics' Properties and process |
87%
Level 1: 80%+
NEET - 2024
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