In an electrical circuit, the voltage is measured as \({V}=(200\pm4)\) volts and the current is measured as \({I}=(20\pm0.2)~\text A.\) The value of the resistance is:
1.
\((10\pm4.2)~\Omega \)
2.
\((10\pm0.3)~\Omega \)
3.
\((10\pm0.1)~\Omega \)
4.
\((10\pm0.8)~\Omega \)
Subtopic: Derivation of Ohm's Law |
51%
From NCERT
NEET - 2024
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A step-up transformer is connected to an AC mains supply of \(220~\text V\) to operate at \(11000~\text V, 88~\text W.\) The current in the secondary circuit, ignoring the power loss in the transformer, is:
1. \(8~\text{mA}\)
2. \(4~\text{mA}\)
3. \(0.4~\text{A}\)
4. \(4~\text{A}\)
1. \(8~\text{mA}\)
2. \(4~\text{mA}\)
3. \(0.4~\text{A}\)
4. \(4~\text{A}\)
Subtopic: Transformer |
63%
From NCERT
NEET - 2024
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A particle is moving along the \(x\text-\)axis with its position \((x)\) varying with time \((t)\) as \(x=\alpha t^{4}+\beta t^{2}+\gamma t+\delta.\) The ratio of its initial velocity to its initial acceleration is:
1. \(2\alpha:\delta \)
2. \(\gamma:2\delta \)
3. \(4\alpha:\beta \)
4. \(\gamma:2\beta \)
1. \(2\alpha:\delta \)
2. \(\gamma:2\delta \)
3. \(4\alpha:\beta \)
4. \(\gamma:2\beta \)
Subtopic: Instantaneous Speed & Instantaneous Velocity |
77%
From NCERT
NEET - 2024
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The radius of gyration of a solid sphere of mass \(5~\text{kg}\) about \(XY \text- \text{axis}\) is \(5~\text m\) as shown in the figure. If the radius of the sphere is \(\frac{5x}{\sqrt{7}}~\text m,\) then the value of \(x\) is:
| 1. | \(5\) | 2. | \(\sqrt{2}\) |
| 3. | \(\sqrt{3}\) | 4. | \(\sqrt{5}\) |
Subtopic: Moment of Inertia |
72%
From NCERT
NEET - 2024
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The \(I\text-V\) characteristics shown below are exhibited by a:
| 1. | Light-emitting diode | 2. | Zener diode |
| 3. | Photodiode | 4. | Solar cell |
Subtopic: Applications of PN junction |
65%
From NCERT
NEET - 2024
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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
1. Be > Li > B > C
2. Li > Be > B > C
3. C > B > Be > Li
4. Li > C > Be > B
Subtopic: Atomic Size |
82%
From NCERT
NEET - 2024
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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: Magnetization & Magnetic Intensity |
79%
From NCERT
NEET - 2024
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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%
From NCERT
NEET - 2024
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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%
From NCERT
NEET - 2024
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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 |
From NCERT
NEET - 2024
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