Home
Class 12
PHYSICS
The total flux phicomes out of a sphere ...

The total flux `phi`comes out of a sphere of radius r. Keeping the amount of charge constant, if the radius of the sphere is made 2r, how much flux will come out of the sphere now?—

A

`2phi`

B

`4phi`

C

`phi/2`

D

`phi`

Text Solution

Verified by Experts

Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • MODEL PAPER SET-07

    UNITED BOOK HOUSE|Exercise EXERCISE|47 Videos

  • MODEL PAPER SET-09

    UNITED BOOK HOUSE|Exercise EXERCISE|40 Videos

Similar Questions

Explore conceptually related problems

The volume of a solid sphere of radius 2r units is

Find the number of sphere of radius r touching the coordinate axes.

Knowledge Check

  • The volume of a sphere of radius r/2 units is

    A
    `1/6 pir^3`cubic unit
    B
    `4/3 pir^3`cubic unit
    C
    `2/3 pir^3`cubic unit
    D
    `1/3 pir^3`cubic unit

  • The viscous force on a small sphere of radius R moving in a fluid varies as

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

  • The rate of change of surface area of a sphere of radius r when the radius is increasing at the rate of 2 cm/s. is proportional to

    A
    `(1)/(r^(2))`
    B
    `r^(2)`
    C
    r
    D
    `(1)/(r )`

    • Similar Questions

    Explore conceptually related problems

    If the radius of a solid sphere is r unit, the total surface area of the quarter sphere is

    Find the volume of the largest cylinder inscribed in the sphere of radius r cm.

    find the volume of the largest cylinder inscribed in the sphere of radius r cm.

    A solid sphere of radius r is melted and cast into the shape of a solid cone of height r, the radius of the base of the cone is____

    If the length of radius of a sphere is increased by 50%, how much percent will be increased of its curved surface area?

    Home
    Profile