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charge conservation is always valid. Is ...

charge conservation is always valid. Is it also true for mass ?

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No, mass conservation is not always. In some nuclear reactions, some mass is lost and it is converted into energy.
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MOTION-ELECTROSTATICS-Exercise -3 Section (B) Previous Year Problems | JEE Main
  1. charge conservation is always valid. Is it also true for mass ?

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  2. Two point charges +8q and -2q are located at x=0 and x=L respectively....

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  3. Two thin wire rings each having a radius R are placed at a distance d ...

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  4. A charged ball B hangs from a silk thread S, which makes an angle thet...

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  5. Two insulting plates are both uniformly charged in such a way that the...

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  6. An electric dipole is placed at an angle of 30^@ to a non-uniform elec...

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  7. Two spherical conductors A and B of radii 1mm and 2mm are separated by...

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  8. The potential at a point x ( measured in mu m) due to some charges sit...

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  9. Charges are placed on the vertices of a square as shown Let vecE ...

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  10. An electric charge 10^-3muC is placed at the origin (0, 0) of X-Y co-o...

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  11. Delta V measured between B and C is

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  12. A thin spherical shell of radius R has charge Q spread uniformly over ...

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  13. Statement I : For a charged particle moving form point P to point Q, t...

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  14. Two points P and Q are maintained at the potentials of 10V and -4V, re...

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  15. Let P(r)=(Q)/(piR^4)r be the charge density distribution for a solid s...

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  16. A charge Q is place at each of the opposite corners of a square. A cha...

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  17. A thin semi-circular ring of radius r has a positive charge q distribu...

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  18. Two identical charged spheres are suspended by strings of equal length...

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  19. Let there be a spherically symmetric charge distribution with charge d...

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  20. Two positive charges of magnitude q are placed at the ends of a side (...

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  21. The electrostatic potential inside a charged spherical ball is given b...

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