Home
Class 12
PHYSICS
A potentiometer wire of length 10 m and ...

A potentiometer wire of length 10 m and resistance `10 Omega` per meter is connected in serice with a resistance box and a 2 volt battery. If a potential difference of 100 mV is balanced across the whole length of potentiometer wire, then then the resistance introduce introduced in the resistance box will be

A

`1900 Omega`

B

`900 Omega`

C

`190 Omega`

D

`90 Omega`

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • CURRENT ELECTRICITY

    DC PANDEY|Exercise Match the columns|4 Videos

  • COMMUNICATION SYSTEM

    DC PANDEY|Exercise Subjective|11 Videos

  • ELECTROMAGNETIC INDUCTION

    DC PANDEY|Exercise Medical entrances gallery|25 Videos

Similar Questions

Explore conceptually related problems

A potentiometer wire of length 10m and resistance 20Omega is connected in series with another resistance of 80Omega and a battery of emf 4V . The potential gradient on the wire will be (in mV//cm )

A potentiometer wire has a length 2 m and resistance of 10 Omega . It is coonnected in series with a resistance of 990 Omega and a cell of e.m.f. 2 V. The potential gradient along the wire is

A potentiometer wire of lengthh 100 cm has resistance 5Omega . It is connected in series with a resistance and a cell of emf 2 v and of negligible internal resistance. A source of emf 5 mv balanced by 10 cm length of potentiometer wire. The value of external resistance is___

A potentiometer wire of length 100 cm has a resistance of 100Omega it is connected in series with a resistance and a battery of emf 2 V and of negligible internal resistance. A source of emf 10 mV is balanced against a length of 40 cm of the potentiometer wire. what is the value of the external resistance?

AB is a potentiometer wire of length 100 cm and its resistance is 10 Omega . It is connected in series with a battery of emf 2V and resistance 40 Omega . If a source of unknown emf E is balanced by 40 cm length of the potentiometer wire, the value of E is :-

A potentiometer wire of length 100 cm having a resistance of 10 Omega is connected in series with a resistance R and a cell of emf 2V of negligible internal resistance. A source of emf of 10 mV is balanced against a length of 40 cm of the potentiometer wire. What is the value of resistance R ?

DC PANDEY-CURRENT ELECTRICITY-Medical entrances gallery
  1. Two bulbs 60 W and 100 W designed for voltage 220 V are connected in s...

    Text Solution

    |

  2. The drift speed of electrons in copper wire of diameter and length l i...

    Text Solution

    |

  3. A potentiometer wire of length 10 m and resistance 10 Omega per meter ...

    Text Solution

    |

  4. If a wire is stretched to four times its length, then the specific res...

    Text Solution

    |

  5. For the circuit shown in figure given below, the equivalent resistance...

    Text Solution

    |

  6. Two resistors of 6 Omega " and " 9 Omega are connected in series to a ...

    Text Solution

    |

  7. A current of 2 A flows in a system of conductor as shown. The potentia...

    Text Solution

    |

  8. A cell sends a current through a resistance R(1) for time t, next the...

    Text Solution

    |

  9. When a current of (2.5 +- 0.5) ampere flows through a wire, it develop...

    Text Solution

    |

  10. To draw the maximum current from a combination of cells, how should be...

    Text Solution

    |

  11. The variation between V-I has shown by graph for heating filament

    Text Solution

    |

  12. Two bulbs when connected in parallel to a source take 60 W each, the p...

    Text Solution

    |

  13. The equivalent resistance resistance between A and B of network shown ...

    Text Solution

    |

  14. A galvanometer having resistance of 50 Omega requires a current of 100...

    Text Solution

    |

  15. Two cells when connected in series are balanced on 8 m on a potentiome...

    Text Solution

    |

  16. In the given circuit diagram if each resistance is of 10 Omega, then t...

    Text Solution

    |

  17. When the current i is flowing through a conductor, the drift velocity ...

    Text Solution

    |

  18. A wire has a resistance of 12 ohm . It is bent in the form of equilat...

    Text Solution

    |

  19. In the circuit shown the cells A and B have negligible resistance. For...

    Text Solution

    |

  20. A milli voltmeter of 25 milli volt range is to be converted into an am...

    Text Solution

    |