Home
Class 12
PHYSICS
‘A point charge +Q is placed at point O ...

‘A point charge +Q is placed at point O as shown in the figure. Is the potential difference `V_A – V_B` positive.

Text Solution

Verified by Experts

Let the distance of point A and B from charge Q be `r_A and r_B` respectively.
`V_A=(+Q)/(4piepsilon_0rA)and V_B=(+Q)/(4piepsilon_0r_B)`
`VA-VB=(+Q)/(4piepsilon_0rA)(1/r_A-1/r_B)`
Also `r_A lt r_B`
`rArr" " 1/r_Agt1/r_BrArr1/r_A-1/r_Bgt0`
`rArr1/r_A-1/r_B` has positive avlue
Also Q is positive.
Promotional Banner

Topper's Solved these Questions

  • CBSE EXAMINATION PAPER - 2016

    CBSE COMPLEMENTARY MATERIAL|Exercise SECTION - B|5 Videos

  • CBSE EXAMINATION PAPER - 2016

    CBSE COMPLEMENTARY MATERIAL|Exercise SECTION - C|16 Videos

  • CBSE BOARD EXAMNATION PAPER (2017 )

    CBSE COMPLEMENTARY MATERIAL|Exercise SECTION E|12 Videos

  • CBSE Examination Paper Delhi–2014

    CBSE COMPLEMENTARY MATERIAL|Exercise SET-III (Questions Uncommon to set-I and II)|9 Videos

Similar Questions

Explore conceptually related problems

A point charge Q is placed at the point O as shown in Fig. Is the potential difference (V)_(A) - V_(B)) positive, negative or zero if Q is (i) possible (ii) negative ?

Positive and negative charges of 1 muC each are placed at two points as shown in the figure. Find the potential difference between A and B

An infinitely long line of linear charge density lambda is shown in the figure. The potential difference V_(A)-V_(B) between the two points A and B is

A battery of e.m.f. 10 V is connected to resistance as shown in figure. The potential difference V_(A) - V_(B) between the point A and B is

In the part of a circuit shown in figure, the potential different (V_(G) - V_(H)) between points G

Two charges are placed s shown in figure below. The potential at point P is

Asseration: A point charge q is placed at centre of spherical cavity inside a spherical conductor as shown. Another point charge Q is placed outside the conductor as shown. Now as the point charge Q is pushed away from conductor, the potential difference (V_(A) - V_(B)) between two points A and B within the cavity of sphere remains constant. Reason: The electric field due to charges on outer surface of conductor and outside the conductor is zero at all points inside teh conductor.

Resistances of 6Omega each are connected in the manner shown in the following figure. The potential difference V_(p)-V_(q) is

A thin metallic spherical shell contains a charge Q on it. A point charge q is placed at the centre of the shell and another charge q_(1) is placed outside it as shown in figure. All the three charges are positive The force on the charge at the centre is

Potential difference V_(A) - V_(B) in the network shown in

CBSE COMPLEMENTARY MATERIAL-CBSE EXAMINATION PAPER - 2016 -SECTION - E
  1. ‘A point charge +Q is placed at point O as shown in the figure. Is the...

    Text Solution

    |

  2. An ac source of voltage V = V 0sin omegat is connected to a series co...

    Text Solution

    |

  3. In a series LR circuit XL = R and power factor of the circuit is P1 ...

    Text Solution

    |

  4. (i) Write the functions of a transformer . State its principle of...

    Text Solution

    |

  5. (i) Write the functions of a transformer . State its principle of...

    Text Solution

    |

  6. (i) Write the functions of a transformer . State its principle of...

    Text Solution

    |

  7. (i) Write the functions of a transformer . State its principle of...

    Text Solution

    |

  8. (i) Write the functions of a transformer . State its principle of...

    Text Solution

    |

  9. (i) Write the functions of a transformer . State its principle of...

    Text Solution

    |

  10. In Young’s double slit experiment, deduce the condition for (a) constr...

    Text Solution

    |

  11. Compare the interference pattern observed in Young’s double slit exper...

    Text Solution

    |

  12. Plot a graph to show variation of the angle of deviation as a function...

    Text Solution

    |

  13. What is dispersion of light? What is its cause?

    Text Solution

    |

  14. Define the term drift velocity

    Text Solution

    |

  15. On the basis of electron drift, derive an expression for resistivity o...

    Text Solution

    |

  16. Why are constantan and manganin used for making standard resistances ?

    Text Solution

    |

  17. (i) State the principle of working of a potentiometer. (ii) In t...

    Text Solution

    |

  18. In the following potentiometer circuit AB is a uniform wire of length ...

    Text Solution

    |