Home
Class 12
PHYSICS
An electron falls freely in electric fie...

An electron falls freely in electric field of `9.1 xx 10^3 NC^(-1)`, then acceleration of electron is .......

A

`1.6 xx 10^(13) ms^(-2)`

B

`1.6 xx 10^(15) cm//s^(2)`

C

`1.6 xx 10^(15) ms^(-2)`

D

`1.6 xx 10^(11) ms^(-2)`

Text Solution

Verified by Experts

The correct Answer is:
B
`a = (Ee)/m = (9.1 xx 10^(3) xx 1.6 xx 10^(-19))/(9.1 xx 10^(-31))`
`=1.6 xx 10^(15) m//s^(2)`
Promotional Banner

Topper's Solved these Questions

  • ELECTRIC CHARGES AND FIELDS

    KUMAR PRAKASHAN|Exercise SECTION D (MULTIPLE CHOICE QUESTIONS (MCQS)) (MCQS FROM .DARPAN. BASED ON TEXTBOOK) (LECTRIC FIELD AND ELECTRIC DIPOLE)|26 Videos

  • ELECTRIC CHARGES AND FIELDS

    KUMAR PRAKASHAN|Exercise SECTION D (MULTIPLE CHOICE QUESTIONS (MCQS)) (MCQS FROM .DARPAN. BASED ON TEXTBOOK) (CONTINUOUS DISTRIBUTION OF CHARGE AND ELECTRIC FLUX)|23 Videos

  • ELECTRIC CHARGES AND FIELDS

    KUMAR PRAKASHAN|Exercise SECTION C NCERT EXEMPLAR SOLUTION (LONG ANSWER TYPE QUESTIONS)|6 Videos

  • DUAL NATURE OF RADIATION AND MATTER

    KUMAR PRAKASHAN|Exercise Section-D (MCQs asked in GUJCET/Board Exam)|1 Videos

  • ELECTROMAGNETIC INDUCTION

    KUMAR PRAKASHAN|Exercise Section D MCQs (MCQs asked in Competitive Exams )|38 Videos

Similar Questions

Explore conceptually related problems

An electron and a proton are in a uniform electric field the ratio of their acceleration will be ..........

An oil drop of 12 exess electrons is held stationary under a constant eletric field of 2.55 xx10^(4) NC^(-1) the density of the oil is 1.26 g cm^(-3) estimage the radius of the drop (g=9.81 m s^(-2) e =1.60 xx10^(-19) C)

An electron falls through a distance of 2 cm ir a uniform electric field of magnitude 6.0 xx 10^4 NC^(-1) figure (a). The direction of the field is reversed keeping its magnitude unchanged and a proton falls through the same distance figure (b). Compute the time of fall ir each case. Contrast the situation with that oi 'free fall under gravity'. m_(e) = 9.1 xx 10^(-31)kg, m_(p) = 1.7 xx 10^(-27) kg and e = 1.6 xx 10^(-19) C

An electric dipole with dipole moment 4 xx 10^(-9) Cm is aligned at 30° with the direction of a uniform electric field of magnitude 5 xx 10^4 NC^(-1) . Calculate the magnitude of the torque acting on the dipole.

An oil drop of 12 excess electrons is held stationary under a constant electric field of 2.55 xx 10^4 NC^(-1) . (Millikan's oil drop experiment). The density of the oil is 1.26 g cm^(-3) . Estimate the radius of the drop, (g = 9.81 ms^(-2), e = 1.60 xx 10^(-19 C)) .

An electron falls throgh a distance of 1.5 cm in a uniform electric field of magnitude 2.0 xx10^(4) N c^(-1) the direction of the field is reversed keeping its magnitude unchanged and a proton falls through the same distance compute the time of falls in each case contrast the situation with that of free fall under gravity

In a hydrogen atom, the electron is moving in a circular orbit of radius 5.3 xx 10^(-11) m with a constant speed of 2.2 xx 10^(6) ms^(-1) . The electric current formed due to the motion of electron is ......

(a) Determine the electrostatic potential energy of a system consisting of two charges 7 µC and –2 µC (and with no external field) placed at (–9 cm, 0, 0) and (9 cm, 0, 0) respectively. (b) How much work is required to separate the two charges infinitely away from each other? (c) Suppose that the same system of charges is now placed in an external electric field E = A(1//r^(2)):A = 9 xx 10^(5) NC^(-1) . What would the electrostatic energy of the configuration be?

An electron falls through a distance of 1.5cm in a uniform electric field of magnitude 2 times 10^4 NC^-1 . The direction of the field is reversed keeping its magnitude unchanged and a proton falls through the same distance. Compute the time of fall in each case.

KUMAR PRAKASHAN-ELECTRIC CHARGES AND FIELDS -SECTION D (MULTIPLE CHOICE QUESTIONS (MCQS)) (MCQS FROM .DARPAN. BASED ON TEXTBOOK) (ELECTROSTATIC ELECTRIC CHARGE AND FRICTIONAL ELECTRICAL CHARGE)
  1. Value of Coulombian constant in CGS unit is

    Text Solution

    |

  2. If Coulomb's law is represented by F=kq(1)q(2) r^(n) , then n = ......

    Text Solution

    |

  3. Coulomb's law is correct for......distance.

    Text Solution

    |

  4. The graph which represents the correct relation between Coulomb force ...

    Text Solution

    |

  5. Electric force on alpha-particle placed in electric Field of 20 xx 10^...

    Text Solution

    |

  6. Value of dielectric constant of metal is.......

    Text Solution

    |

  7. S.I. unit of permittivity (e0) ......

    Text Solution

    |

  8. The value of permittivity of vaccum is 8.85 xx 10^(-12) C^(2)N^(-1) m^...

    Text Solution

    |

  9. Two spheres carrying charge q are hanging from a same point of suspens...

    Text Solution

    |

  10. If two opposite electric charges having same magnitude are 10 cm away ...

    Text Solution

    |

  11. A proton is 1836 times heavier than an electron. If the repulsive forc...

    Text Solution

    |

  12. The position vectors of two point charges of 2 nC each are (2hati + 3h...

    Text Solution

    |

  13. The force of repulsion between two like or point charges + 2C and + 6C...

    Text Solution

    |

  14. The force of repulsion between two charges +1 and 6C is 12N. A third c...

    Text Solution

    |

  15. Two particles of equal mass m and charge t are placed at a distance 16...

    Text Solution

    |

  16. Three identical charges are placed on three vertices of a square. If t...

    Text Solution

    |

  17. The radius of a conducting spherical shell is 10 mm and a 100 muC cha...

    Text Solution

    |

  18. An electron falls freely in electric field of 9.1 xx 10^3 NC^(-1), the...

    Text Solution

    |

  19. One conducting metal sphere contains 10^23 atoms. If from 0.1 % atoms ...

    Text Solution

    |

  20. Two charged particles of equal charges are placed 1 m apart. The initi...

    Text Solution

    |