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Equipotentials at a great distance from ...

Equipotentials at a great distance from a collection of charges whose total sum is not zero are approximately

A

spheres

B

planes

C

paraboloids

D

ellipsoids

Text Solution

Verified by Experts

The correct Answer is:
A
In this problem, the collection of charges, whose total sum is not zero, with regard to great distance can be considered as a point charge. The equipotentials due to point charges are spherical in shape as electric potential due to point charges `q` is given by
`V = k_(e) (q)/(r )`
This suggest that electric potentials due to point charge is same for all equidistance points. the locus of these equidistance points, which are at sam epotential, form sphere surface.
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Knowledge Check

  • Equipotentials at a great distance from a collection of charges, whose total sum is not zero, are approximaltey

    A
    spheres
    B
    planes
    C
    paraboloids
    D
    ellipsoids

  • The figure shows two parallel equipotential surfaces A and B kept a small distance r apart from each other. A point charge of q coulomb is taken from the surface A to B. The amount of net work done will be

    A
    `1/(4pi epsilon_(0))q/(r^(2))`
    B
    Zero
    C
    `-1/(4pi epsilon_(0))q/r`
    D
    `-1/(4pi epsilon_(0)) . q/(r^(2))`

  • The minimum number of unequal vectors whose vector sum can be zero is

    A
    1
    B
    2
    C
    3
    D
    4

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