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A conducting sphere of radius 10 cm has ...

A conducting sphere of radius 10 cm has unknown charge. If the electric field at a distance 20 cm from the centre of the sphere is `-1.2xx10^(3)NC^(-1)` and points radially inwards. The net charge on the sphere is

A

`-4.5 xx 10^(-9)C`

B

`4.5 xx 10^(9)C`

C

`-5.3 xx 10^(-9)C`

D

`5.3 xx 10^(9)C`

Text Solution

Verified by Experts

The correct Answer is:
C
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Knowledge Check

  • A conducting sphere of radius 5 cm has an unknown charge. The electric field at 10 cm from the centre of the sphere is 1.8xx10^(3)NC^(-1) and points radially inward. What is the net charge on the sphere?

    A
    `1.8nC`
    B
    `2nC`
    C
    `1nC`
    D
    `1.5nC`

  • A spherical conductor of radius 2 cm is uniformly charged with 3 nC. What is the electric field at a distance of 3 cm from the centre of the sphere?

    A
    `3xx10^(6)"Vm"^(-1)`
    B
    `3"Vm"^(-1)`
    C
    `3xx10^(4)"Vm"^(-1)`
    D
    `3xx10^(-4)"Vm"^(-1)`

  • A conducting sphere of radius R is charged to a potential of V volt. Then the electric field at a distance r (gt R) from the centre of the sphere would be

    A
    `(RV)/(r^(2))`
    B
    `(V)/(R )`
    C
    `(rV)/(R^(2))`
    D
    `(R^(2)V)/(r^(2))`

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