Home
Class 12
PHYSICS
Potentials of points P and Q are 10 V ...

Potentials of points P and Q are 10 V and - 4 V respectively. Work done in taking 100 electrons from P to Q ........

A

`22.4xx10^(-16)J`

B

`2.24 xx10^(-16) J`

C

`-9.6xx10^(-17) J`

D

`9.6xx10^(-17) J`

Text Solution

Verified by Experts

The correct Answer is:
A, B, D

Let `DeltaV = V_(Q)-V_(P) =- 4 -10 =- 14V `
`:. W = q (V_(2)-V_(1))= (V_(Q)-V_(p))q `
`=(-4-10) (-1.6xx10^(-19)xx100) ( because`q= ne)
`=14xx1.6xx10^(-17) = 2.24 xx10^(-16)` J
Promotional Banner

Topper's Solved these Questions

  • ELECTROSTATIC POTENTIAL AND CAPACITANCE

    KUMAR PRAKASHAN|Exercise Section D ( Multiple Choice Questions (MCQs) )|93 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

Potenlials of points P and Q are 10V and -4 V respectively. Work done in taking 100 electrons from P to Q ........

The ionization potential of hydrogenic ions P and Q are V_(P) and V_(Q) respectively. If V_(Q) lt V_(P) then radii ......

Two charges - q and + q are located at points A(0, 0, - a) and B(0, 0, + a) respectively, work done in moving small test charge from point P(7, 0, 0) to Q(- 3, 0, 0) is ...... .

In an electric field. electric potential at point A is 40 V and that at point B is 90 V. The work to be done in taking 2 C charge from point A to point B is …………….. .

Potential at a point A is 3 volt and at a point B is 7 V , an electron is moving towards A form B .work done

A point source emits sound equally in all directions in a non-absorbing medium. Two points P and Q are at distance of 2 m and 3 m respectively from the source. The ratio of the intensities of the waves at P and Q is ......

A non viscous liquid of constant density 10^(3) kg//m^(3) flows in stream line motion along a vertical tube PQ of variable cross-section. Height of P and Q are 2m and 2.5m respectively. Area of tube at Q is equal to 3 times the area of tube at 'P'. Then work done per unit volume by pressure as liquid flows from P and Q. Speed of liquid at 'P' is 3 m//s .

Potential difference between points P and Q would be ...... .

Potential difference between points P and Q would be ......

KUMAR PRAKASHAN-ELECTROSTATIC POTENTIAL AND CAPACITANCE-Section D ( MCQs asked in Cometitive Exams )
  1. An electric charge 10^(-3) muC is placed at the origin (0, 0) of X-Y c...

    Text Solution

    |

  2. A battery is used to charge a parallel plate capacitor till the potent...

    Text Solution

    |

  3. Potentials of points P and Q are 10 V and - 4 V respectively. Work d...

    Text Solution

    |

  4. Two capacitors C(1) and C(2) are charged to 120 V and 200 V respectiv...

    Text Solution

    |

  5. A parallel plate capacitor is made of two circular plates separated ...

    Text Solution

    |

  6. Assum that an electric field vecE = 30 x^(2) hati exists in space. The...

    Text Solution

    |

  7. A combination of capacitors is set up as shown in the figure. The mag...

    Text Solution

    |

  8. An electrical technician requires a capacitance,of 2 muF in a circuit...

    Text Solution

    |

  9. Consider A, D and C to be the co-centric shells of metal . Their radii...

    Text Solution

    |

  10. A parallel plate capacitor of capacitance 90 pF is connected to a bat...

    Text Solution

    |

  11. A 60 pF capacitor is fully charged by a 20 V supply. It is then discon...

    Text Solution

    |

  12. If two capacitors C(1) and C(2) are connected in a parallel combinatio...

    Text Solution

    |

  13. lf the electric field around a surface is given by |vecE|=(Q)/(E(0)...

    Text Solution

    |

  14. A parallel plate air capacitor of capacitance C is connected to a cell...

    Text Solution

    |

  15. A parallel plate air capacitor has capacity 'C' distance of separation...

    Text Solution

    |

  16. In a certain region, the electric potential is given by the formula V(...

    Text Solution

    |

  17. A capacitor of 2 muF is charged as shown in the diagram . When the swi...

    Text Solution

    |

  18. A parallel-plate capacitor of area A, plate separation d and capacitan...

    Text Solution

    |

  19. A molecule of a substance has permanent dipole moment p. A mole of thi...

    Text Solution

    |

  20. A parallel plate capacitor is to be designed using a dielectric of die...

    Text Solution

    |