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A polythene piece rubbed will wool is fo...

A polythene piece rubbed will wool is found to have a negative charge of `3.0xx10^(-7)C`.
(a) Estimate the number of electrons transferred (from which to which )?
(b) Is there a transfer of mass from wool to polythene?

Text Solution

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(a) `2xx10^(12)` form wool to polythene
(b) yes but of a negligible amount (`=2xx10^(-18)` kg in the example )
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NCERT TAMIL-ELECTRIC CHARGES AND FIELDS -EXERCISES
  1. A system has two charges q(A)= +2.5xx10^(-7)C and q(B)= -2.5xx10^(-7)C...

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  2. An electrtic dipole with dipole moment 4xx10^(-9) C m is aligned at ...

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  3. A polythene piece rubbed will wool is found to have a negative charge ...

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  4. Two insulated charged copper spheres A and B have their centres separa...

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  5. Two insulated identically sized charged copper spheres A and B have th...

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  6. Track of three charged particles in a uniform electrostatic field s...

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  7. Consider a uniform eleceric field =3 xx 10^(3) hati N//C. a. What is...

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  8. What is the net flux of the uniform electric field of Exercise 1.15 th...

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  9. Careful measurement of the electric field at the surface of a black...

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  10. A point charge +10mu C is at a distance 5 cm directly above the centre...

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  11. A point charge of 2.0 mu c is at the centre of a cubic gaussian ...

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  12. A point charge causes an electric flux of -1.0xx10^(3) N m^(2)//C to p...

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  13. A conducting sphere of radius 10 cm has an unknown charge if the elect...

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  14. A uniformaly charged conducting sphere of diameter 2.4 m has a surface...

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  15. An infinite line charge produces a field of 9 xx 10^(4)N//C at a dista...

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  16. Two large, thin metal plates are parallel and close to each other. On ...

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  17. An oil drop of 12 excess electrons is field stationary under constant ...

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  18. Which among the curves cannot possibly represent electrostatic fie...

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  19. In a certain region of space, electric field is along the z-direction ...

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  20. (a) a conductor a with a cavity given a charge Q show that the enti...

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