A wheel of a bullock cart is rolling on a level road as shown in the figure below. If its linear speed is vv in the direction shown, which one of the following options is correct (PP and QQ are any highest and lowest points on the wheel, respectively)?
| 1. | Point PP moves faster than point QQ. |
| 2. | Both the points PP and QQ move with equal speed. |
| 3. | Point PP has zero speed. |
| 4. | Point PP moves slower than point QQ. |
55%
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NEET - 2024
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Match List I with List II.
Choose the correct answer from the options given below:
| List I (Spectral Lines of Hydrogen for transitions from) |
List II (Wavelength (nm)) |
||
| A.A. | n2=3n2=3 to n1=2n1=2 | I.I. | 410.2410.2 |
| B.B. | n2=4n2=4 to n1=2n1=2 | II.II. | 434.1434.1 |
| C.C. | n2=5n2=5 to n1=2n1=2 | III.III. | 656.3656.3 |
| D.D. | n2=6n2=6 to n1=2n1=2 | IV.IV. | 486.1486.1 |
| 1. | A−III,B−IV,C−II,D−IA−III,B−IV,C−II,D−I |
| 2. | A−IV,B−III,C−I,D−IIA−IV,B−III,C−I,D−II |
| 3. | A−I,B−II,C−III,D−IVA−I,B−II,C−III,D−IV |
| 4. | A−II,B−I,C−IV,D−IIIA−II,B−I,C−IV,D−III |
Subtopic: Spectral Series |
62%
From NCERT
NEET - 2024
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A thermodynamic system is taken through the cycle abcda.abcda. The work done by the gas along the path bcbc is:
1. 30 J30 J
2. −90 J−90 J
3. −60 J
4. zero
1. 30 J30 J
2. −90 J−90 J
3. −60 J
4. zero
Subtopic: Work Done by a Gas |
70%
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A battery with an EMF of 10 V and an internal resistance of 1 Ω is connected to an external resistance of 4 Ω, as shown in the figure. The terminal voltage of the battery in this configuration is:
| 1. | 6 V | 2. | 8 V |
| 3. | 10 V | 4. | 4 V |
Subtopic: EMF & Terminal Voltage |
70%
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NEET - 2024
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In an ideal transformer, the turns ratio is NpNs=12. The ratio Vs:Vp is equal to (the symbols carry their usual meaning):
1. 2:1
2. 1:1
3. 1:4
4. 1:2
1. 2:1
2. 1:1
3. 1:4
4. 1:2
Subtopic: Transformer |
71%
From NCERT
NEET - 2024
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A light ray enters through a right-angled prism at point P with the angle of incidence 30∘ as shown in the figure. It travels through the prism parallel to its base BC and emerges along the face AC. The refractive index of the prism is:
| 1. | √52 | 2. | √34 |
| 3. | √32 | 4. | √54 |
Subtopic: Prisms |
From NCERT
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The quantities which have the same dimensions as those of solid angle are:
1. stress and angle
2. strain and arc
3. angular speed and stress
4. strain and angle
1. stress and angle
2. strain and arc
3. angular speed and stress
4. strain and angle
Subtopic: Dimensions |
65%
From NCERT
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A thin flat circular disc of radius 4.5 cm is placed gently over the surface of water. If the surface tension of water is 0.07 Nm−1, then the excess force required to take it away from the surface is:
1. 198 N
2. 1.98 mN
3. 99 N
4. 19.8 mN
1. 198 N
2. 1.98 mN
3. 99 N
4. 19.8 mN
Subtopic: Surface Tension |
53%
From NCERT
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Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
In the light of the above statements, choose the correct answer from the options given below:
| Assertion (A): | The potential (V) at any axial point, at 2 m distance (r) from the centre of the dipole of dipole moment vector →P of magnitude, 4×10−6 C m, is ±9×103 V. (Take 14πε0=9×109 SI units) |
| Reason (R): | V=±2P4πε0r2, where r is the distance of any axial point situated at 2 m from the centre of the dipole. |
| 1. | Both (A) and (R) are True and (R) is not the correct explanation of (A). |
| 2. | (A) is True but (R) is False. |
| 3. | (A) is False but (R) is True. |
| 4. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
Subtopic: Electric Potential |
58%
From NCERT
NEET - 2024
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In a uniform magnetic field of 0.049 T, a magnetic needle performs 20 complete oscillations in 5 seconds as shown. The moment of inertia of the needle is 9.8×10−6 kg m2. If the magnitude of magnetic moment of the needle is x×10−5 Am2; then the value of 'x' is:
| 1. | 128π2 | 2. | 50π2 |
| 3. | 1280π2 | 4. | 5π2 |
Subtopic: Bar Magnet |
53%
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NEET - 2024
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