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The escape speed of an electron launched...

The escape speed of an electron launched from the surface of a 1cm diameter glass sphere that has been charged to `10 nC` is ……. `xx 10^(7) m//sec`. (Round off in the nearest integer)

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The correct Answer is:
`8`
`1/2 mv^(2)=(-Kqe)/(r)`
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ALLEN-MISCELLANEOUS-Exersice-04[A]
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  2. Three charges 0.1 coulomb each are placed on the corners of an equila...

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  3. The escape speed of an electron launched from the surface of a 1cm dia...

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  4. Three point charges q, 2q and 8q are to be placed on a . 9cm long st...

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  5. A charge +Q is uniformly distributed over a thin ring with radius R....

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  6. A simple pendulum of length l and bob mass m is hanging in front of a ...

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  7. Two fixed, equal, positive charges, each of magnitude 5xx10^-5 coul ar...

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  8. Positive and negative charges of 1 muC each are placed at two points a...

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  9. Two charges -2Q abd Q are located at the points with coordinates (-3a,...

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  10. A point charge +q & mass 100 gm experiences a force of 100N at a po...

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  11. A dipole is placed at origin of coordinate system as shown in figure, ...

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  12. Two short dipoles phat(k) and P/2 hat(k) are located at (0,0,0) & (1m,...

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  13. Show that, for a given dipole, V & E cannot have the same magnitude at...

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  14. The length of each side of a cubical closed surface is l If charge q i...

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  15. A point charge Q is located on the axis of a disc of radius R at a dis...

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  16. A charge Q is uniformly distributed over a rod of length l. Consider a...

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  17. A particle of mass m and charge -q moves along a diameter of a uniform...

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  18. A charge Q is distributed over two concentric hollow spheres of radii ...

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  19. Three concentric spherical metallic shells A, B and C of radii a, b an...

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  20. There are 27 drops of a conducting fluid. Each has a radius r and they...

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