Home
Class 12
PHYSICS
27 small drops of water having same char...

27 small drops of water having same chargt and same radius are combined to form one big drop. The ratio of capacitance of one big drop to small drop is .......

A

`2:1`

B

`3:1`

C

`1:3`

D

`1:2`

Text Solution

Verified by Experts

The correct Answer is:
A, C
`(C_("Big"))/(C_("small"))= n^((1)/(3))`
`:. C_(B) : C_(S)= (27)^((1)/(3)):1`
`:. C_(B) : C_(3)=3:1`
Promotional Banner

Topper's Solved these Questions

  • ELECTROSTATIC POTENTIAL AND CAPACITANCE

    KUMAR PRAKASHAN|Exercise Section D ( MCQs asked in Cometitive Exams )|39 Videos

  • ELECTROSTATIC POTENTIAL AND CAPACITANCE

    KUMAR PRAKASHAN|Exercise Section C ( NCERT Exemplar Solution ) ( Long Answer Type Questions )|12 Videos

  • ELECTROMAGNETIC WAVES

    KUMAR PRAKASHAN|Exercise BOARD.S QUESTION PAPER MARCH - 2020 (PART - B) SECTION - C|5 Videos

  • MAGNETISM AND MATTER

    KUMAR PRAKASHAN|Exercise SECTION D Multiple Choice Questions (MCQs) (MCQs asked in Competitive Exams) MCQs asked in Board Exam and GUJCET|7 Videos

Similar Questions

Explore conceptually related problems

64 small drops of water having same charge and same radius are combined to form one big drop. The ratio of capacitance of big drop to small drop is

Two mercury drops (each of radius r) merge to form a bigger drop. The surface energy of the bigger drop, if T is the surface tension is

Which falls faster , big rain drops or small rain drops ?

Why small drops of liquid are spherical in shape ?

Two small drops of mercury each of radius r coalesce to form a single large drop of radius R. The ratio of the total surface energies before and after the change is ……

A spherical drop of water bas 3 xx 10^(10) C amount of charge residing on it. 500 V electric potential exists on its surface. Calculate the radius of this drop. If eight such drops (having identical charge and radii) combine to form a single drop, calculate the electric potential on the surface of the new drop. (k = 9 xx 10^(9) SI)

Water drops are falling from a pipe at 5 m height at regular interval of time. When the third drop is released at the same time the first drop touches the ground. Then the height of second drop from ground is ....... m. (g = 10 ms^(-2) )

A big drop is formed by coalescing 1000 small droplets of water. What will be the change in surface energy What will be the ratio between the total surface energy of the droplets and the surface energy of the big drop?

There are 27 drops of a conducting fluid. Each has a radius r and they are charged to a potential V_(0) . They are then combined to form a bigger drop. Find its potential.

KUMAR PRAKASHAN-ELECTROSTATIC POTENTIAL AND CAPACITANCE-Section D ( Multiple Choice Questions (MCQs) )
  1. By increasing the charge on the plate of capacitor .......... .

    Text Solution

    |

  2. In the figure below the capacitance of ever capacitor is 3 muF. Find t...

    Text Solution

    |

  3. 27 small drops of water having same chargt and same radius are combine...

    Text Solution

    |

  4. If the charge on capacitor is increased by 5C, the energy stored in th...

    Text Solution

    |

  5. The capacitance of a variable capacitor joined with a battery of 100 V...

    Text Solution

    |

  6. 4 muF and 6 muF capacitors are joined in series and 500 V are applied ...

    Text Solution

    |

  7. Two spherical shells of radius 20 cm and 10 cm, having same charge of ...

    Text Solution

    |

  8. The area of every plate shown in the figure is A and the separation be...

    Text Solution

    |

  9. The capacitance of a parallel plate capacitor formed by the circular p...

    Text Solution

    |

  10. If a capacitor having capacitance of 600 muF is charged at a uniform r...

    Text Solution

    |

  11. The capacitance of a capildtor is 10 muF . The potential difference on...

    Text Solution

    |

  12. 3 identical capacitors are joined in parallel and are charged with a b...

    Text Solution

    |

  13. To get 2F capacitance, the area of each plate kept at separation of 2 ...

    Text Solution

    |

  14. Considering the earth as a metallic sphere its capacitance would be n...

    Text Solution

    |

  15. If volume of Earth is V and area of Earth is A, then its capacitance w...

    Text Solution

    |

  16. The distance between two plates of capacitor is d and area of each pla...

    Text Solution

    |

  17. Find the effective capacitance between A and B or a given circuit.

    Text Solution

    |

  18. For a given circuit, the effective capacitance between P and U is .......

    Text Solution

    |

  19. A network of capacitors are prepared as shown in figure. Find the equi...

    Text Solution

    |

  20. The potential at point D is = ....... as shown In below figure. ...

    Text Solution

    |