Home
Class 12
PHYSICS
The emf of a battery A is balanced by a ...

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

A

2V

B

1.4V

C

1.5V

D

1.6V

Text Solution

Verified by Experts

The correct Answer is:
D
`v=irhol`
Promotional Banner

Topper's Solved these Questions

  • CURRENT ELECTRICITY

    NARAYNA|Exercise Level 1 H.W|63 Videos

  • CURRENT ELECTRICITY

    NARAYNA|Exercise Level 2 C.W|59 Videos

  • CURRENT ELECTRICITY

    NARAYNA|Exercise C.U.Q|105 Videos

  • COMMUNICATION SYSTEM

    NARAYNA|Exercise Level-II(H.W)|25 Videos

  • DUAL NATURE OF RADIATION AND MATTER

    NARAYNA|Exercise ASSERTION AND REASON|15 Videos

Similar Questions

Explore conceptually related problems

The e.m.f. E of the battery is balanced by p. d. across 75 cm of a potentiometer wire. For a standard cell of e.m.f. 1.02 V, the balancing length is 50 cm. The value of E is

In a potentiometer of one meter length , an unknown emf voltage source is balanced at 60cm length of the potentiometer wire , while a 3volt battery is balanced at 45cm length, then the emf of the voltage source is

In a potentiometer of one metre length, an unknown emf voltage source is balanced at 60 cm length of potentiometer wire, while a 3 volt battery is balanced at 45 cm length. The the emf of the unknown voltage source is.

In a experiment for callibration of voltmeter a standard cell of emf 1.5 V is balanced at 300 cm length of potentiometer wire. The P.D across a resistance in the circuit is balanced at 1.25 m. If a voltmeter is connected across the same resistance it reads 0.65 V. The error in the volt meter is

In an experiment for calibration of voltmeter, standard cell of emf 1.5 V is balanced at 300 cm length of potentiometer wire. The P.D. Across a resistace in the circuit is balanced at 1.25 m. if a voltmeter, it reads 0.65 V. The error I te volt meter is

Figure shows a potentiometer circuit, a cell of emf E_1 is balanced by length l' of the potentiometer wire. If this cell is replaced by another of emf E_2 , it is found that total length of potentiometer wire has to be increased by 50%, in order to have the same balance length (l'). Then E_1//E_2 is______.

The emf of a standard cell is 1.5V and is balanced by a length of 300 cm of a potentiometer with 10 m long wire. Find the percentage error in a voltmeter which balances at 350 cm when its reading is 1.8 V.

The length of a potentiometer wire is 10 cm. A cell of emf E is balanced at a length 10/3 cm from the positive end of the wire. If the length of the wire is increased by 5 cm, at what distance (in cm) from positive end will the same cell give a balance point?

NARAYNA-CURRENT ELECTRICITY-Level 1 C.W
  1. A 10 m long wire of resistance 15 ohm is connectd in series with a bat...

    Text Solution

    |

  2. When a resistance of 2 ohm is placed across a battery the current is 1...

    Text Solution

    |

  3. A battery has six cells in series. Each has an emf 1.5 V and internal ...

    Text Solution

    |

  4. 12 cells of each emf 2 V are connected in series among them, if 3 cell...

    Text Solution

    |

  5. When a battery connected across a resistor of 16Omega the voltage acro...

    Text Solution

    |

  6. Six resistors of each 2 ohm are connected as shown in the figure. The ...

    Text Solution

    |

  7. in the given circuit current through the galvanometer is

    Text Solution

    |

  8. The potential difference between A & B in the given branch of a circui...

    Text Solution

    |

  9. The resistance between A and B is

    Text Solution

    |

  10. The resistance between A and B is

    Text Solution

    |

  11. In the figure given the value of X resistance will be, when the p.d. b...

    Text Solution

    |

  12. When an unknown resistance and a resistance of 4Omega are connected in...

    Text Solution

    |

  13. In a meter bridge, the gaps are closed by resistances 2 and 3 ohm. The...

    Text Solution

    |

  14. Two equal resistance are connected in the gaps of a metre bridge. If t...

    Text Solution

    |

  15. A potentiometer having a wire of 4 m lengths is connected to the termi...

    Text Solution

    |

  16. The emf of a battery A is balanced by a length 80 cm on a potentio met...

    Text Solution

    |

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

    Text Solution

    |

  18. In a potentiometer experiment the balancing length with a cell is 560 ...

    Text Solution

    |

  19. The resitivity of a potentio meter wire is, if the area of cross secti...

    Text Solution

    |

  20. A potentiometer wire of 10 m length and 20 ohm resistance is connected...

    Text Solution

    |