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Define surface density of electric charg...

Define surface density of electric charge.
Two large conducting spheres carrying charges `Q_(1)` and `Q_(2)` are brought close to each other. Is the magnitude of the electrostatic force between them exactly given by `(Q_(1)Q_(2))/(4 pi epsilon_(0)r^(2))` where r is the distance betwen their centres?

Text Solution

Verified by Experts

Ist part: Surface charge density is the amount of electric charge per unit surface area.
2nd part: Na
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Two large conducting sphere carrying charges Q_(1) and Q_(2) are brought close to each other. Is the magnitude of the electrostatic force between them exactly given by Q_(1) Q_(2) //4pi in_(0) r^(2) , where r is the distance between their centres ?

Two large conducting spheres carrying charges Q_1 and Q_2 are brought close to each other. Is the magnitude of the force between them exactly given by (Q_1Q_2) /(4 pi epsilon_0r^2) where r is the distance between their centres ?

Knowledge Check

  • A metallic shell of inner radius a and outer radius b is carrying a charge Q. Another point charge -q is placed at the centre of the shell. Then the electrostatic potential of the shell is (k=1/(4piepsilon_0))

    A
    0
    B
    `(KQ)/a`
    C
    `K(Q-q)/R`
    D
    `K(Q-q)/b`

  • A conducting sphere of radius R is given a charge Q. The electric potential and the electric field at the centre of the sphere respectively are

    A
    Zero and `Q/(4piin_0R_2)`
    B
    `Q/(4piin_0R)` and zero
    C
    `Q/(4piin_0R)` and `Q/(4piin_0R_2)`
    D
    Both are zero

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