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How much positive and negative charge i...

How much positive and negative charge is there in a cup of water ?

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Let us assume that the mass of one cup of water is 250 g the molecular mass of water is 18 g thus one mole of water is 18 g therefore the number of molecules in one cup of water is `(250//18)xx6.02 xx10^(23)` each molecule of water contains two hydrogen atoms and one oxygen total negative charge has the same magnitude it is equal to `(250//18)xx6.02 xx10xx1.6 xx10^(-10^(-19) C=1.34 xx10^(7)C`
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NCERT TAMIL-ELECTRIC CHARGES AND FIELDS -EXERCISES
  1. How much positive and negative charge is there in a cup of water ?

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  2. What is the force between two small charged spheres having charges of...

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  3. The electrostatic force on a small sphere of charge 0.4 muC due to ano...

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  4. A mass m(1) is moving on a plane surface along a straight path under t...

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  5. a. Explain the meaning of the statement 'electric charge of a body is ...

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  6. When a glass rod is rubbed with a silk cloth, charges appear on both. ...

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  7. Four point charges q(A) = 2 mu C , q(B) = -5 mu C, q(C) = 2 mu C and ...

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  8. (a) An electrostaic field line is a continous curve. That is a field l...

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  9. Two point charges q(A) = 3 mu C and q(B) = -3 muC are located 20 cm ...

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  10. A system has two charges q(A)= +2.5xx10^(-7)C and q(B)= -2.5xx10^(-7)C...

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

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

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

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

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

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

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

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

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

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

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

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