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. |
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. |
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. |
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. |
1. | constant acceleration |
2. | constant velocity but varying acceleration |
3. | varying velocity and varying acceleration |
4. | constant velocity |
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. |
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 |
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4. | ![]() |
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. |