- AThe mass of nucleus
- BThe mass of proton
- CThe mass of neutron
- DThe mass defect of nucleus
Explanation:
To find the binding energy, add the masses of the individual protons, neutrons, and electrons, subtract the mass of the atom, and convert that mass difference to energy.
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Two parallel conductors A and B of equal lengths carry currents I and 10 I, respectively, in the same direction. Then
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(a) A and B will repel each other with same force |
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(b) A and B will attract each other with same force |
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(c) A will attract B, but B will repel A |
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(d) A and B will attract each other with different forces |
Two similar spheres having +q and -q charge are kept at a certain distance. F force acts between the two. If in the middle of two spheres, another similar sphere having +q charge is kept, then it experience a force in magnitude and direction as
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(a) Zero having no direction |
(b) 8F towards +q charge |
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(c) 8F towards -q charge |
(d) 4F towards +q charge |
Two point charges +9e and +e are at 16 cm away from each other. Where should another charge q be placed between them so that the system remains in equilibrium
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(a) 24 cm from +9e |
(b) 12 cm from +9e |
(c) 24 cm from +e |
(d) 12 cm from +e |

One face of a rectangular glass plate 6 cm thick is silvered. An object held 8 cm in front of the first face, forms an image 12 cm behind the silvered face. The refractive index of the glass is
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(a) 0.4 |
(b) 0.8 |
(c) 1.2 |
(d) 1.6 |
The equivalent resistance and potential difference between A and B for the circuit is respectively
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(a) 4 W, 8 V |
(b) 8 W, 4 V |
(c) 2 W, 2 V |
(d) 16 W, 8 V |
An a particle is accelerated through a p.d of
volt then K.E. of particle will be
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(a) 8 MeV |
(b) 4 MeV |
(c) 2 MeV |
(d) 1 MeV |
A long solenoid carrying a current produces a magnetic field B along its axis. If the current is doubled and the number of turns per cm is halved, the new value of the magnetic field is
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(a) B |
(b) 2 B |
(c) 4 B |
(d) B/2 |