Home
Class 12
PHYSICS
A neutral pendulum oscillates in a unifo...

A neutral pendulum oscillates in a uniform electric field as shown in figure. If a positive charge is given to the pendulum, then its time period

A

will increase

B

will decrease

C

will remain constant

D

will first increase then decrease

Text Solution

Verified by Experts

The correct Answer is:
A

`g_e=g-((qE)/m)`
or `g_e` will decrease. Hence, `T=2pi sqrt (l/g_e)` will increase
Promotional Banner

Topper's Solved these Questions

  • ELECTROSTATICS

    DC PANDEY ENGLISH|Exercise Level 1 Objective|82 Videos
  • ELECTROSTATICS

    DC PANDEY ENGLISH|Exercise Level 1 Subjective|15 Videos
  • ELECTROSTATICS

    DC PANDEY ENGLISH|Exercise Exercise 24.7|2 Videos
  • ELECTROSTATIC POTENTIAL AND CAPACITORS

    DC PANDEY ENGLISH|Exercise (C) Chapter exercises|50 Videos
  • GRAVITATION

    DC PANDEY ENGLISH|Exercise All Questions|135 Videos
DC PANDEY ENGLISH-ELECTROSTATICS-Level 1 Assertion And Reason
  1. The electrical potential function for an electrical field directed par...

    Text Solution

    |

  2. The electric potential decreases uniformly from 100 V to 50 V as one m...

    Text Solution

    |

  3. In the uniform electric field shown in figure, find : a. VA-VD b....

    Text Solution

    |

  4. In figure (a), a charge q is placed just outside the centre of a close...

    Text Solution

    |

  5. Net charge within an imaginary cube drawn in a uniform electric field ...

    Text Solution

    |

  6. A hemispherical body of radius R is placed in a uniform electric field...

    Text Solution

    |

  7. A cube has sides of length L = 0.2 m. It is placed with one corner at ...

    Text Solution

    |

  8. Assertion: An independnt negative charge moves itself from point A to ...

    Text Solution

    |

  9. Assertion: When two unlike charges are brought nearer, their electrost...

    Text Solution

    |

  10. Assertion: At a point electric potential is decreasing along x-axis at...

    Text Solution

    |

  11. Assertion: Electric potential on the surface of a charged sphere of ra...

    Text Solution

    |

  12. Assertion: Gauss's theroem can be applied only for a closed surface. ...

    Text Solution

    |

  13. Assertion: In the electric field E=(4hati+4hatj)N//C electric potentia...

    Text Solution

    |

  14. Assertion: Two charges -q each are fixed points A and B. When a third ...

    Text Solution

    |

  15. Assertion: A small electric dipole is moved translatonally from higher...

    Text Solution

    |

  16. Assertion: In case of charged spherical shells, E-r graph is discontin...

    Text Solution

    |

  17. Assertion: If we see along the axis of a chaged ring, the magnitudeof ...

    Text Solution

    |

  18. Units of electric flux are

    Text Solution

    |

  19. A neutral pendulum oscillates in a uniform electric field as shown in ...

    Text Solution

    |