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Two insulated charged copper sphere A an...

Two insulated charged copper sphere A and B of identical size have charges `q_A` and `q_B`, respectively. A third sphere C of the same size but uncharged is brought in contact with the first and then in contact from both. The new charges on A and B respectively

A

`(q_A+q_B)/2,(q_A)/2`

B

`(q_A)/2, (q_A + 2q_B)/4`

C

`(q_A+q_B)/4,(q_A)/2`

D

`(2q_A+q_B)/2,(q_A)/2`

Text Solution

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The correct Answer is:
B
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Knowledge Check

  • Two spheres are separately charged and then brought in contact, so

    A
    total charge on the two spheres is conserved
    B
    total energy of the two spheres is conserved
    C
    Both (a) and (b)
    D
    none of the above

  • If two conducting spheres are separately charged and then brought in contact

    A
    the total energy of the two spheres is conserved
    B
    the total charge on the spheres is conserved
    C
    both the total energy and charge are conserved
    D
    the final potential is always the mean of the original potential of the two spheres

  • If two conducting spheres are separately charged and then brought in contact.

    A
    The total energy of the two spheres is conserved
    B
    The total charge on the two spheres is conserved
    C
    Both the total energy and charge are conserved
    D
    The final potential is always the mean of the original potentials of the two spheres

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