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statement 1 : For practical purposes, th...

statement 1 : For practical purposes, the earth is used as a reference at zero potencial in electrical circuits. statement 2 : The electrical potential of a sphere of radius R with charge Q uniformly distributed on the surface is given by `(Q)/(4piepsilon_0R)`.

A

Statement-1 is True, Statement-2 is True, Statement-2 is a correct explanation for Statement-1

B

Statement-1 is True, Statement-2 is True, Statement-2 is NOT a correct explanation for Statement-2

C

Statement-1 is True, Statement-2 is False

D

Statement-1 is False, Statement-2 is True

Text Solution

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The correct Answer is:
A
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Knowledge Check

  • Q amount of electric charge is present on the surface of a sphere having radius R. Calculate the total energy of the system.

    A
    `(kQ^(2))/(R)`
    B
    `(1)/(2) (kQ^(2))/(R)`
    C
    `(kQ^(2))/(R^(2))`
    D
    `(1)/(2) (kQ^(2))/(R^(2))`

  • A hollow metal sphere of radius R is uniformly charged. The electric field due to the sphere at a distance r from the centre

    A
    increases as r increases for r lt R and for r gt R
    B
    zero as r increases for r lt R, decreases as r increases for r gt R.
    C
    zero as r increases for r lt R, increases as r increases for r gt R.
    D
    decreases as r increases for r lt R and for r gt R.

  • 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/(4piepsilon_(0)R^(2))`
    B
    `Q/(4piepsilon_(0)R)` and zero
    C
    `Q/(4piepsilon_(0)R)` and `Q/(4piepsilon_(0)R^(2))`
    D
    Both are zero

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