- AUncontrolled fission reaction
- BNuclear fusion reaction
- CControlled fission reaction
- DPhotoelectric effect
Explanation:
Nuclear fusion is a reaction in which two or more atomic nuclei come close enough to form one or more different atomic nuclei and subatomic particles (neutrons and/or protons).
The difference in mass between the products and reactants is manifested as the release of large amounts of energy.
A hydrogen bomb derives its energy from this type of nuclear reaction.
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
The curve drawn between velocity and frequency of photon in vacuum will be a
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(a) Straight line parallel to frequency axis |
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(b) Straight line parallel to velocity axis |
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(c) Straight line passing through origin and making an angle of 45o with frequency axis |
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(d) Hyperbola |
In Young’s double slit experiment, the central bright fringe can be identified
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(a) By using white light instead of monochromatic light |
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(b) As it is narrower than other bright fringes |
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(c) As it is wider than other bright fringes |
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(d) As it has a greater intensity than the other bright fringes |
If the refractive indices of a prism for red, yellow and violet colours be 1.61, 1.63 and 1.65 respectively, then the dispersive power of the prism will be
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(a) |
(b) |
(c) |
(d) |
Tesla is the unit of
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(a) Electric flux |
(b) Magnetic flux |
(c) Electric field |
(d) Magnetic field |
A proton and an a-particle are accelerated through a potential difference of 100 V. The ratio of the wavelength associated with the proton to that associated with an a-particle is
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(a) |
(b) 2 : 1 |
(c) 2 |
(d) |
In a potentiometer experiment two cells of e.m.f. E1 and E2 are used in series and in conjunction and the balancing length is found to be 58 cm of the wire. If the polarity of E2 is reversed, then the balancing length becomes 29 cm. The ratio of the e.m.f. of the two cells is
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(a) 1 : 1 |
(b) 2 : 1 |
(c) 3 : 1 |
(d) 4 : 1 |
A uniform wire of resistance R is uniformly compressed along its length, until its radius becomes n times the original radius. Now resistance of the wire becomes
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(a) |
(b) |
(c) |
(d) nR |
Assertion : The ionising power of b-particle is less compared to a-particles but their penetrating power is more.
Reason : The mass of b-particle is less than the mass of a-particle.
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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. |