Home
Class 12
PHYSICS
In figure, AB is a potentiometer wire, l...

In figure, AB is a potentiometer wire, length 10 m and resistance `2 Omega` with open the balancing length is 5.5 m. However, on closing key K the balancing length reduces to 5 m. The initial resistance of the cell `E_(1)` is

A

`0.01Omega`

B

`0.1Omega`

C

`0.2Omega`

D

`1Omega`

Text Solution

Verified by Experts

The correct Answer is:
B
`r_(1)=R_(1)((l_(1)-l_(2))/(l_(2)))`
`=1((5.5-5)/(5))=(0.5xx1)/(5)=0.1Omega`
Promotional Banner

Topper's Solved these Questions

  • CURRENT ELECTRICITY

    NIKITA PUBLICATION|Exercise Multiple Choice Questions|314 Videos

  • COMMUNICATION SYSTEMS

    NIKITA PUBLICATION|Exercise Multiple Choice Questions (Examples for Practice)|8 Videos

  • ELASTICITY

    NIKITA PUBLICATION|Exercise MCQ|314 Videos

Similar Questions

Explore conceptually related problems

In the givenn figure AB is a potentiometer wire of length 10 m and resistance 1Omega with key K open the balancing length is 5.5 m. however on closing key K the balancing length reduces to 5m. The initial resistance of the cell E_(1) is

In figure AB is a potentiometer wire of length 10 m and resistance 1Omega . The balancing length for 2V potential drop is 18 m. The e.m.f. of the battery E is

In the figure shown wire AB has a length of 100 cm and resistance 8Omega . Find the balance point length l .

In given figure, the potentiometer wire AB has a resistance of 5 Omega and length 10 m . The balancing length AM for the emf of 0.4 V is

In a potentiometer experiment the balancing with a cell is at length 240 cm. On shunting the cell with a resistance of 2Omega , the balancing length becomes 120 cm.The internal resistance of the cell is

In an experiment to determine the internal resistance of a cell with potentiometer, the balancing length is 165 cm. When a resistance of 5 ohm is joined in parallel with the cell the balancing length is 150 cm. The internal resistance of cell is

A cell of e.m.f. 1.2 V is balanced by 150 cm of potentiometer wire. When the cell is shunted by a resistance of 4 Omega , the balancing length is reduced by 30 cm. What is the internal resistance of the cell ?

In an experiment to find the internal resistance of a cell by a potentiometer, a balance was obtained for 50 cm length of the potentiometer wire, with a cell of e.m.f. 2V. When the cell was shunted by a resistance of 2 Omega , the balancing length of the potentiometer wire was 40 cm. What was the internal resistance of the cell ?

In a potentiometer experiment , the balancing length for a cell was found to the 1.20 M . Now , a resistance of 10 Omega is connected across the terminals of this cell and the balancing length becomes 80 cm . The internal resistance of this cell is .

NIKITA PUBLICATION-CURRENT ELECTRICITY-Multiple Choice Questions
  1. The potential gradient along the length of a uniform wire is 5 V/m. Th...

    Text Solution

    |

  2. In figure AB is a potentiometer wire of length 10 m and resistance 1...

    Text Solution

    |

  3. In figure, AB is a potentiometer wire, length 10 m and resistance 2 Om...

    Text Solution

    |

  4. A plantinum wire has resistance of 10 Omega at 0^(@)C and 20 Omega at ...

    Text Solution

    |

  5. In the adjacent circuit the ammeter reads 5.0 A and voltmeter reads 20...

    Text Solution

    |

  6. Following are the readings of potential and current through a specimen...

    Text Solution

    |

  7. In a potentiometer experiment the balancing length is 8 m, when the tw...

    Text Solution

    |

  8. Six cells each of e.m.f. 2 V and internal resistance 0.1Omega are conn...

    Text Solution

    |

  9. Find the equivalent resistance of the network given in the figure,

    Text Solution

    |

  10. Four identical resistances are joined as shown in the figure. The equi...

    Text Solution

    |

  11. The length and readius of a wire is l and r respectively. Its resist...

    Text Solution

    |

  12. A copper wire of length 1 m and radius is joined in series with an iro...

    Text Solution

    |

  13. The internal resistance of a primary cell is 4 Omega . It generates a...

    Text Solution

    |

  14. A capacitor of 10 mu F has a potential difference of 40 V across it....

    Text Solution

    |

  15. The resistance of a conductor is 5Omega at 50^(@)C and 6Omega at 100^...

    Text Solution

    |

  16. In an electrical cable there is a single wire of radius 9 mm of copper...

    Text Solution

    |

  17. A copper wire of length l and radius r is nickel plated till its final...

    Text Solution

    |

  18. In the figure given below find the resistance between points A and B. ...

    Text Solution

    |

  19. The resistance of a wire of iron is 10 ohm and temperature coefficient...

    Text Solution

    |

  20. Drift velocity of electrons in a conductor bearing potential differen...

    Text Solution

    |