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10^(12)alpha- particles (Nuclei of heliu...

`10^(12)alpha`- particles (Nuclei of helium) per second falls on a neutral sphere, calculate time in which sphere gets charged by `2mu C`.

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6.25
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Knowledge Check

  • A spherical capacitor has an inner sphere of radius 10 cm and outer sphere of radius 12 cm . The outer sphere is earthed and the inner sphere is given a charge of 5 mu C . The capacitance of the capacitor is

    A
    `2.40 ( pi epsilon_(0))`
    B
    `4.80 ( pi epsilon_(0))`
    C
    `2.00 ( pi epsilon_(0))`
    D
    ` 3.00 ( pi epsilon_(0))`

  • The number of alpha particles emitted per second by 1g of 88^226 Ra is 3.7 times 10^10 . The decay constant is :

    A
    `1.39 times 10^-11 sec^-1`
    B
    `13.9 times 10^-11 sec^-1`
    C
    `139 times 10^-10 sec^-1`
    D
    `13.9 times 10^-10 sec^-1`

  • A conducting sphere carries a net charge of -6 mu C . The sphere is located at the center of a conducting spherical shell that carries a net charge of +2 mu C as shown in the figure. Determine the excess charge on the outer surface of the spherical shell.

    A
    `-4 mu C`
    B
    `+4 mu C`
    C
    `- 8 mu C`
    D
    `+8 mu C`
    • CENGAGE PHYSICS-ELECTRIC CHARGES AND FIELDS-QUESTION BANK
    1. 10^(12)alpha- particles (Nuclei of helium) per second falls on a neutr...

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    2. An infinite number of charges, each equal to q, are placed along the x...

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    3. Three charges, each of value q, are placed at the comers of an equilat...

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    4. A circular wire of radius r has a uniform linear charge density lambda...

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    5. A point charge q=100 mu C is located in the x-y plane at the point wit...

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    6. If the electric flux through a surface of area 100 m^(2) lying in thé ...

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    7. Two infinite linear charges are placed parallel to each other at a dis...

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    8. A uniform electric field E=500 N /C passes through a hemispherical sur...

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    9. Linear charge densities of the two rods are given as lambda(1)=(-lambd...

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    10. Two point charges exert a force F((d)), on each other when placed in v...

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    11. A linear charge having linear charge density lambda, penetrates a cube...

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    13. Two charges, each of -q, are fixed and separated by a distance 2 d. A ...

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    14. A charged particle enters at point A and comes out from point B. Its v...

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    15. A clock face has negative charges -q,-2 q,-3 q, ....,-12 (q) fixed at ...

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    16. In a certain region, vec(B) increases radially as vec(E)=90 r(-hat(r))...

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    17. The electric field in a region is radially outward with magnitude E=A ...

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    19. A thin insulating uniformly charged (linearly charged density lambda )...

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