Two resistors of resistance, \(100\) \(\Omega\) and \(200\) \(\Omega\) are connected in parallel in an electrical circuit. The ratio of the thermal energy developed in \(100\) \(\Omega\) resistor to that in \(200\) \(\Omega\) resistor in a given time is:
1. \(4:1\)
2. \(1:2\)
3. \(2:1\)
4. \(1:4\)
Subtopic: Heating Effects of Current |
69%
From NCERT
NEET - 2022
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NEET 2023 - Target Batch - Aryan Raj Singh
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Two hollow conducting spheres of radii \(R_1\) and \(R_2\) \(\left ( R_1\gg R_2 \right )\) have equal charges. The potential would be:
| 1. | dependent on the material property of the sphere |
| 2. | more on bigger sphere |
| 3. | more on smaller sphere |
| 4. | equal on both the spheres |
Subtopic: Electric Potential |
71%
From NCERT
NEET - 2022
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NEET 2023 - Target Batch - Aryan Raj Singh
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The angular speed of a flywheel moving with uniform angular acceleration changes from \(1200\) rpm to \(3120\) rpm in \(16\) s. The angular acceleration in rad/s² is:
1. \(104 \pi\)
2. \(2\pi\)
3. \(4\pi\)
4. \(12\pi\)
1. \(104 \pi\)
2. \(2\pi\)
3. \(4\pi\)
4. \(12\pi\)
Subtopic: Rotational Motion: Kinematics |
74%
From NCERT
NEET - 2022
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NEET 2023 - Target Batch - Aryan Raj Singh
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When light propagates through a material medium of relative permittivity, \(\epsilon_{r}\) and relative permeability, \(\mu_{r}\) the velocity of light, \(v\) is given by:
(\(c\) = velocity of light in vacuum)
1. \(v=\frac{{c}}{\sqrt{\epsilon_{r} \mu_{{r}}}}\)
2. \(v={c}\)
3. \(v=\sqrt{\frac{\mu_{{r}}}{\epsilon_{{r}}}}\)
4. \(v=\sqrt{\frac{\epsilon_{{r}}}{\mu_{{r}}}}\)
(\(c\) = velocity of light in vacuum)
1. \(v=\frac{{c}}{\sqrt{\epsilon_{r} \mu_{{r}}}}\)
2. \(v={c}\)
3. \(v=\sqrt{\frac{\mu_{{r}}}{\epsilon_{{r}}}}\)
4. \(v=\sqrt{\frac{\epsilon_{{r}}}{\mu_{{r}}}}\)
Subtopic: Properties of EM Waves |
86%
From NCERT
NEET - 2022
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NEET 2023 - Target Batch - Aryan Raj Singh
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A long solenoid of radius \(1~\text{mm}\) has \(100\) turns per mm. If \(1~\text{A}\) current flows in the solenoid, the magnetic field strength at the centre of the solenoid is:
| 1. | \(6.28 \times 10^{-4} ~\text{T} \) | 2. | \(6.28 \times 10^{-2}~\text{T}\) |
| 3. | \(12.56 \times 10^{-2}~\text{T}\) | 4. | \(12.56 \times 10^{-4} ~\text{T}\) |
Subtopic: Magnetic Field due to various cases |
63%
From NCERT
NEET - 2022
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A shell of mass m is at rest initially. It explodes into three fragments having masses in the ratio \(2:2:1\). If the fragments having equal masses fly off along mutually perpendicular directions with speed \(v,\) the speed of the third (lighter) fragment is:
1. \(3 \sqrt{2} v\)
2. \(v\)
3. \(\sqrt{2} v\)
4. \(2 \sqrt{2} v\)
1. \(3 \sqrt{2} v\)
2. \(v\)
3. \(\sqrt{2} v\)
4. \(2 \sqrt{2} v\)
Subtopic: Linear Momentum |
69%
From NCERT
NEET - 2022
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NEET 2023 - Target Batch - Aryan Raj Singh
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As the temperature increases, the electrical resistance:
| 1. | decreases for conductors but increases for semiconductors |
| 2. | increases for both conductors and semiconductors |
| 3. | decreases for both conductors and semiconductors |
| 4. | increases for conductors but decreases for semiconductors |
Subtopic: Energy Band theory |
73%
From NCERT
NEET - 2022
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NEET 2023 - Target Batch - Aryan Raj Singh
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A biconvex lens has radii of curvature, \(20\) cm each. If the refractive index of the material of the lens is \(1.5,\) the power of the lens is:
| 1. | infinity | 2. | \(+2\) D |
| 3. | \(+20\) D | 4. | \(+5\) D |
Subtopic: Lenses |
72%
From NCERT
NEET - 2022
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NEET 2023 - Target Batch - Aryan Raj Singh
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Given below are two statements:
| Statement I: | Biot-Savart's law gives us the expression for the magnetic field strength of an infinitesimal current element \(I(dl)\) of a current-carrying conductor only. |
| Statement II: | Biot-Savart's law is analogous to Coulomb's inverse square law of charge \(q,\) with the former being related to the field produced by a scalar source, \(Idl\) while the latter being produced by a vector source, \(q.\) |
| 1. | Statement I is false but Statement II is true. |
| 2. | Both Statement I and Statement II are true. |
| 3. | Both Statement I and Statement II are false. |
| 4. | Statement I is true but Statement II is false. |
Subtopic: Biot-Savart Law |
52%
From NCERT
NEET - 2022
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A square loop of side \(1\) m and resistance \(1\) \(\Omega\) is placed in a magnetic field of \(0.5\) T. If the plane of the loop is perpendicular to the direction of the magnetic field, the magnetic flux through the loop is:
| 1. | \(0\) | 2. | \(2\) weber |
| 3. | \(0.5\) weber | 4. | \(1\) weber |
Subtopic: Magnetic Flux |
66%
From NCERT
NEET - 2022
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NEET 2023 - Target Batch - Aryan Raj Singh
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