If the monochromatic source in Young's double slit experiment is replaced by white light, then:
1. there will be a central dark fringe surrounded by a few coloured fringes.
2. there will be a central bright white fringe surrounded by a few coloured fringes.
3. all bright fringes will be of equal width.
4. interference pattern will disappear.

Subtopic:  Young's Double Slit Experiment |
 66%
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NEET - 2024
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Given below are two statements:
Statement I: Atoms are electrically neutral as they contain equal number of positive and negative charges.
Statement II: Atoms of each element are stable and emit their characteristic spectrum.
 
In the light of the above statements, choose the most appropriate answer from the options given below:
1. Both Statement I and Statement II are incorrect.
2. Statement I is correct but Statement II is incorrect.
3. Statement I is incorrect but Statement II is correct.
4. Both Statement I and Statement II are correct.
Subtopic:  Spectral Series |
From NCERT
NEET - 2024
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The maximum elongation of a steel wire of \(1~\text m\) length if the elastic limit of steel and its Young's modulus, respectively, are \(8 × 10^8 ~\text{N m}^{-2 }\) and \(2 × 10^{11} ~\text{N m}^{-2},\) is:
1. \(0.4~\text{mm}\)
2. \(40~\text{mm}\)
3. \(8~\text{mm}\)
4. \(4~\text{mm}\)
Subtopic:  Young's modulus |
 68%
From NCERT
NEET - 2024
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Consider the following Statements A and B and identify the correct answer:
                   
A. For a solar-cell, the \(I\text-V\) characteristics lies in the IV quadrant of the given graph.
B. In a reverse-biased pn junction diode, the current measured in (\(\mu \text{A}\)), is due to majority charge carriers.
 
1. A is incorrect but B is correct.
2. Both A and B are correct.
3. Both A and B are incorrect.
4. A is correct but B is incorrect.
Subtopic:  Applications of PN junction |
 56%
From NCERT
NEET - 2024
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A particle moving with uniform speed in a circular path maintains:
1. constant acceleration
2. constant velocity but varying acceleration
3. varying velocity and varying acceleration
4. constant velocity
Subtopic:  Circular Motion |
 59%
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NEET - 2024
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If \(c\) is the velocity of light in free space, the correct statements about photons among the following are:

(A) The energy of a photon is \(E=h\nu.\)
(B) The velocity of a photon is \(c.\)
(C) The momentum of a photon, \(p={\dfrac{h\nu}{c}}.\)
(D) In a photon-electron collision, both total energy and total momentum are conserved.
(E) Photon possesses a positive electric charge.
Choose the correct answer from the options given below:
1. (A), (B), (C) and (D) only
2. (A), (C) and (D) only
3. (A), (B), (D) and (E) only
4. (A) and (B) only
Subtopic:  Particle Nature of Light |
 64%
From NCERT
NEET - 2024
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Two bodies \(A\) and \(B\) of the same mass undergo completely inelastic one-dimensional collision. The body \(A\) moves with velocity \(v_1\) while the body \(B\) is at rest before collision. The velocity of the system after collision is \(v_2.\) The ratio of \(v_1:v_2\) is:
1. \(2:1\)
2. \(4:1\)
3. \(1:4\)
4. \(1:2\)
Subtopic:  Collisions |
 65%
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NEET - 2024
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The graph that shows the variation of \({\dfrac{1}{\lambda^2}}\) with the kinetic energy \(E\) (where \(\lambda\) is the de-Broglie wavelength of a free particle) is:
1. 2.
3. 4.
Subtopic:  De-broglie Wavelength |
 57%
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NEET - 2024
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An unpolarised light beam strikes a glass surface at Brewster's angle. Then:
1. The refracted light will be completely polarised.
2. Both the reflected and refracted light will be completely polarised.
3. The reflected light will be completely polarised but the refracted light will be partially polarised.
4. The reflected light will be partially polarised.
Subtopic:  Polarization of Light |
 68%
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NEET - 2024
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At any instant of time \(t,\) the displacement of any particle is given by \(2t-1\) (SI unit) under the influence of the force of \(5~\text N.\) The value of instantaneous power (in SI units) is:
1. \(5\)
2. \(7\)
3. \(6\)
4. \(10\)
Subtopic:  Power |
 73%
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NEET - 2024
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