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How many electrons must be removed from ...

How many electrons must be removed from a piece of metal to give it a positive charge of `1.0 xx 10^(-7)C`

A

`6.25 xx 10^(11)`

B

`62.5 xx 10^(11)`

C

`62.5 xx 10^(-11)`

D

`625 xx 10^(11)`

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The correct Answer is:
A
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AAKASH SERIES-ELECTRIC CHARGES AND FIELDS-Exercise-II
  1. How many electrons must be removed from a piece of metal to give it a ...

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  2. A proton and an electron are placed 1.6cm apart in free space. Find th...

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  3. Two identical copper spheres are separated by 1m in vacuum. How many e...

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  4. The force between two electrons when placed in air is equal to 0.5 tim...

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  5. Two charged particles having charge 2.0 xx 10^(-8)C. Each are joined b...

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  6. Two electrons separated by distance .r. experience a force F between t...

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  7. Two charges of equal magnitude and at a distance .r. exert a force F o...

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  8. Four point charge of +10^(-7)C, -10^(-7)C, -2 xx 10^(-7)C and +2 xx 10...

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  9. Two positive charges separated by a distance 2m each other with a forc...

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  10. A Copper atom has 29 electrons revolving around the nucleus. A copper ...

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  11. A pith ball of mass 9 xx 10^(-5) kg carries a charge of 5muC. What mus...

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  12. N fundametal charges each of charge .q. are to be distributed as two p...

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  13. Two point charages placed at a distance r. in the air experiene a cert...

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  14. Two charges 2 C and 6 C are separated by a finite distance. If a charg...

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  15. Two small balls having equal positive charge Q C on each are suspended...

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  16. The force between two similar charges of magnitude 2C each separated b...

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  17. Two charges 2muC and 1muC are placed at a distance of 10cm. Where shou...

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  18. Deuteron and alpha-particle are put 1 A^(@) apart in Air. Magnitude of...

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  19. Two point charges Q and -3Q are placed at some distance apart. If the ...

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  20. The electric field at (30, 30) cm due to a charge of -8nC at the origi...

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