- ASound waves and light waves
- BWater waves and radio waves
- CLight waves and X-rays
- DSound waves and water waves
Explanation:
Light waves and X-rays are electromagnetic waves.
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A and B are two conductors carrying a current i in the same direction. x and y are two electron beams moving in the same direction
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(a) There will be repulsion between A and B attraction between x and y |
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(b) There will be attraction between A and B, repulsion between x and y |
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(c) There will be repulsion between A and B and also x and y |
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(d) There will be attraction between A and B and also x and y |
Assertion : A charged capacitor is disconnected from a battery. Now if its plate are separated farther, the potential energy will fall.
Reason : Energy stored in a capacitor is equal to the work done in charging it.
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(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
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(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
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(c) If assertion is true but reason is false. |
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(d) If assertion is false but reason is true. |
For a nucleus to be stable, the correct relation between neutron number N and Proton number Z is
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(a) N > Z |
(b) N = Z |
(c) N < Z |
(d) N ≥ Z |

Assertion : The energy of charged particle moving in a uniform magnetic field does not change.
Reason : Work done by magnetic field on the charge is zero.
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(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
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(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
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(c) If assertion is true but reason is false. |
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(d) If the assertion and reason both are false. |
The ionisation potential of hydrogen atom is 13.6 volt. The energy required to remove an electron in the n = 2 state of the hydrogen atom is
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(a) 27.2 eV |
(b) 13.6 eV |
(c) 6.8 eV |
(d) 3.4 eV |