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An electric field required to keep a wat...

An electric field required to keep a water drop of mass m just to remain suspended, when charged with one electron is

A

em /g

B

m g/e

C

e m g

D

m g

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MODERN PUBLICATION-TEXUAL QUESTIONS -EXERCISE
  1. A hollow cylindrical conductor having positive charge is placed near a...

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  2. The number of electrons to be put on a spherical conductor of radius 0...

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  3. An electric field required to keep a water drop of mass m just to rem...

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  4. There is an electric field E in x-direction. If the work done on movin...

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  5. What is the angle between the electric dipole moment and the electric ...

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  6. An arbitraty surface enclose a dipole. What is the electric flux throu...

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  7. A hollow metallic sphere of radius 10 cm is charged, such that potenti...

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  8. Two equal and opposite charges (+q and -q) are situated at x distance ...

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  9. A charge q is distributed over two concentric hollow spheres of raddii...

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  10. What is not true for equipotential surface for a uniform electric fiel...

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  11. Which of the following is not the property of equipotential surfaces?

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  12. The charge given to any conductor resides on its outer surface, becaus...

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  13. The electrostatic capacitance depends on

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  14. n identical mercury droplets charged to the same potential V coalesce ...

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  15. The capacitance of a parallel plate capacitor increases with

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  16. 27 small drops, each having charge q and radius r coalesce to forma bi...

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  17. The potentials of the two plates of capacitors are +10 V and - 10V. Th...

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  18. A capacitor of 20 muF charged uptp 500 V is connected in parallel with...

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  19. Three capacitors 2,3 and 6 muF are connected in series to a 10 V sourc...

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  20. 700 pF capacitor is charged by a 50 V battery, How much electrostatic ...

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