Home
Class 12
PHYSICS
A student finds the balancing length to ...

A student finds the balancing length to be .l. with a cell of constant emf in the secondary circuit. Another student connects the same cell in the secondary circuit of potentio meterof double the length but with a cell of half the emf in the primary circuit. The balancing length will be [cell in primary is ideal and no series resistance is present in primary circuit]

A

4l

B

l/4

C

2l

D

l/2

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • CURRENT ELECTRICITY

    AAKASH SERIES|Exercise PRACTICE SHEET (EXERCISE - V LEVEL-II (ADVANCED) (Straight Objective Type Questions))|3 Videos

  • CURRENT ELECTRICITY

    AAKASH SERIES|Exercise PRACTICE SHEET (EXERCISE - V LEVEL-II (ADVANCED) (More than One correct answer Type Questions))|3 Videos

  • CURRENT ELECTRICITY

    AAKASH SERIES|Exercise PRACTICE SHEET (EXERCISE - IV LEVEL-I (MAIN) (Straight Objective Type Questions))|5 Videos

  • CURRENT ELECTRICITY

    AAKASH SERIES|Exercise PROBLEMS (LEVEL-II)|26 Videos

  • DUAL NATURE OF RADIATION AND MATTER

    AAKASH SERIES|Exercise PRACTICE EXERCISEX|44 Videos

Similar Questions

Explore conceptually related problems

If the current in the primary circuit is decreased, then balancing length for same measuring potential difference is obtained at

The length of a potentiometer wires is l.A cell of emf E is balanced at a length ((l)/(3)) from positive end of the wire . If the length of the wire is increased by ((l)/(2)) the distance at which the same cell gives the balancing point is ( Cell in the primary is ideal and no series resistance is present in the primary circuit . )

The potential gradients on the potentiometer wire are V_(1) and V_(2) with an ideal cell and a real cell of same emf in the primary circuit then

For the working of potentiometer, the emf of cell in the primary circuit (E) compared to the emf of the cell in the secondary circuit (E^(1)) is

Choose the correct statements from the following a) in potentiometer experiment balancing length represent the potential difference across the secondary cell b) the shunt resistance between the terminals of cell in the secondary circuit of potentiometer is increased, the balancing length increases c) in potentiometer experiment the e.m.f of the cell in the secondary circuit may be greater than the e.m.f of cell in the primary circuit d) potentiometer is used to measure thermo e.m.f. also

connected in the secondary circuit of a potentiometer one at a time and the balancing length are respectively 400cm and 440cm .The emf of the cell A is 1.08 V. The emf of the second cell B in volt is

A cell of emf 'E' and internal resistance r connected in the secondary gets balanced against length l of potentiometer wire. If a resistance 'R' is connected in parallel with the cell, then the new balancing length for the cell will be

When 6 identical cells of no internal resistance are connected in series in the secondarycircuit of a potentio meter, the balancing lengths is .l., balancing length becomes 1/3 when some cells are connected wrongly, the number of cells connected wrongly are

The length of potentiometer wire is 200 cm and the emf of standard cell is primary circuit is E volts. It is employed to a battery of emf 0.4 v the balance point is obtained at l = 40 cm from positive end, the E of the battery is (cell in primary is ideal and series resistance is zone

AAKASH SERIES-CURRENT ELECTRICITY-PRACTICE SHEET (EXERCISE - V LEVEL-I (MAIN) (Straight Objective Type Questions))
  1. The emf of a battery A is balanced by a length of 80cm on a potentio m...

    Text Solution

    |

  2. The balancing lengths of potentiometer wire are 800 cm and 600cm when ...

    Text Solution

    |

  3. When 6 identical cells of no internal resistance are connected in seri...

    Text Solution

    |

  4. The balancing length for a cell is 560cm in a potentiometer experiment...

    Text Solution

    |

  5. The resistivity of a potentiometer wire is, if the area of cross secti...

    Text Solution

    |

  6. The length of potentiometer wire is 200 cm and the emf of standard cel...

    Text Solution

    |

  7. The emf of a cell is 2V and its internal resistance is 2 ohm. A resist...

    Text Solution

    |

  8. A galvanometer has coil of resistance 50Omega and shows full deflectio...

    Text Solution

    |

  9. A galvanometer of resistance 1000Omega gives full-scale deflection for...

    Text Solution

    |

  10. A galvanometer of 25 ohm resistance can read a maximum current of 6mA....

    Text Solution

    |

  11. A galvanometer has a current range of 15mA and voltage range of 750mv....

    Text Solution

    |

  12. In a galvanometer, a current of 1muA produces a deflection of 20 divis...

    Text Solution

    |

  13. Figures of merit of two galvanometers of resistance 100Omega and 50Ome...

    Text Solution

    |

  14. When 0.005A current flows through a moving coil galvanometer, it gives...

    Text Solution

    |

  15. A galvanometer of resistance 40Omega and current passing through it is...

    Text Solution

    |

  16. An electrical meter of internal resistance 20Omega gives a full scale ...

    Text Solution

    |

  17. A student finds the balancing length to be .l. with a cell of constant...

    Text Solution

    |

  18. In an experiment for calibration of voltmeter, a standard cell of emf ...

    Text Solution

    |

  19. A potentiometer wire of length 10m and resistance 30 ohm is connected ...

    Text Solution

    |