Home
Class 12
PHYSICS
The emf of a cell is 2V and its internal...

The emf of a cell is 2V and its internal resistance is 2 ohm. A resistance of 8 ohm is joined to battery in parallel. This is contacted in secondary circuit of potentio meter. If IV standard cell balances for 100cm of potentiometer wire, the balance point of above cell is

A

120cm

B

240cm

C

160cm

D

116cm

Text Solution

Verified by Experts

The correct Answer is:
C
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

Two cells of emf 1.25V, 0.75V and each of internal resistance 1 ohms are connected in parallel. The effective voltage will be

A potentiometer has a wire of 100cm length and its resistance is 10 Ohms. It is connected in series with a resistance of 40 ohms and a battery of emf 2V and negligible internal resistance. If a source of unknown emf E connected in the secondary is balanced by 40cm length of potentiometer wire, the value of 'E' is

A 6 V cell with 1 ohm internal resistance and 10 V cell with 2 ohm internal resistance and 10 ohm extarnal resistance are connected in parallel . The current in ampere through 10 V cells is

The emf of a battery A is balanced by a length of 80cm on a potentio meter wire. The emf of a standard cell 1v is balanced by 50cm. The emf of A 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

1 ohm resistance is in series with an Ammeter which is balanced by 75cm of potentiometer wire. A standard cell of 1.02V is balanced by 50cm. The Ammeter shows a reading of 1.5A. The error in the Ammeter reading is

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

    |