Home
Class 12
PHYSICS
Two cells of emfs approximately 5V and 1...

Two cells of emfs approximately `5V and 10V` are to be accurately compared using a potentiometer of length 400cm

A

The battery that runs the potentiometer should have voltage of 8V

B

The battery of potentiometer can have a voltage of 15 V and R adjusted so that the potential drop across the wire slightly exceeds 10 V

C

The first portion of 50 cm of wire itself should have a potential drop of 10 V

D

Potentiometer is usually used for comparing resistances and not voltages

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • CURRENT ELECTRICITY

    DC PANDEY ENGLISH|Exercise B. Assertion and reason|18 Videos

  • CURRENT ELECTRICITY

    DC PANDEY ENGLISH|Exercise Match the columns|4 Videos

  • CURRENT ELECTRICITY

    DC PANDEY ENGLISH|Exercise Check point|70 Videos

  • COMMUNICATION SYSTEM

    DC PANDEY ENGLISH|Exercise Subjective|11 Videos

  • ELECTROMAGNETIC INDUCTION

    DC PANDEY ENGLISH|Exercise Medical entrances gallery|25 Videos

Similar Questions

Explore conceptually related problems

Two cells of emfs approximately 5V and 10V are to be accurately compared using a poteniometer of length 400 cm.

Two cells of emfs approximately 5V and 10V are to be accurately compared using a poteniometer of length 400 cm.

Two cells of emf E_(1) and E_(2) are to be compared in a potentiometer (E_(1) gt E_(2)) . When the cells are used in series correctly , the balancing length obtained is 400 cm. When they are used in series but E_(2) is connected with reverse polarities, the balancing obtaiend is 200cm. Ratio of emf of cells is

An ideal battery of emf 2 V and a series resistance R are connected in the primary circuit of a potentiometer of length 1 m and resistance 5Omega The value of R, to give a potential difference of 5 m V across 10 cm of potentiometer wire is

The length of the potentiometer wire is 600 cm and a current of 40 mA is flowing in it. When a cell of emf 2 V and internal resistance 10Omega is balanced on this potentiometer the balance length is found to be 500 cm. The resistance of potentiometer wire will be

AN ideal battery of 4 V and resistance R are connected in series in the primary circuit of a potentiometer of length 1 m and and resistance 5Ω the value of R, to give a difference of 56mV across 10 cm of potentiometer wire , is :

There is a potentiometer wire of length 1200 cm and 60 mA current is flowing in it. A battery of emf 5V and internal resistance of 20 ohm is balanced on potentiometer wire with balancing length 1000 cm. The resistance of potentiometer wire is

A potentiometer wire of length 1m and resistance 20 Omega is connected in series with a 15V battery and an external resistance 40 Omega . A secondary cell of emf E in the secondary circuit is balanced by 24 cm long potentiometer wire. The emf E of the cell is ,

The wire of potentiometer has resistance 4 Omega and length 1m. It is connected to a cell of e.m.f. 2V and internal resistance 1 Omega . The current flowing through the potentiometer wire is

Two cells A and B of emf 1.3 V and 1.5V respectively are arranged as shown in figure. The voltmeter reds 1.45V . The voltmeter is assumed to be ideal. Then

DC PANDEY ENGLISH-CURRENT ELECTRICITY-Taking it together
  1. A, B and C are voltmeters of resistances R, 1.5R and 3R respectively. ...

    Text Solution

    |

  2. A metel rod of the length 10cm and a rectangular cross-section of 1 cm...

    Text Solution

    |

  3. Two cells of emfs approximately 5V and 10V are to be accurately compar...

    Text Solution

    |

  4. The resistivity of a potentiometer wire is 40xx10^(-8)Omega-m and its ...

    Text Solution

    |

  5. Two cells of emfs E(1) and (E(2) (E(1) gt E(2)) are connected as shows...

    Text Solution

    |

  6. A voltmeter of resistance 998 Omega is connected across a cell of emf ...

    Text Solution

    |

  7. A wire of 50 cm long, 1mm^(2) in cross-section carries a current of 4 ...

    Text Solution

    |

  8. Three resistance P, Q, R each of 2 Omega and an unknown resistance S f...

    Text Solution

    |

  9. A 2 V battery, a 990Omega resistor and a potentiometer of 2 m length, ...

    Text Solution

    |

  10. The electron with change (q=1.6xx10^(-19)C) moves in an orbit of radiu...

    Text Solution

    |

  11. Two resistance wires on joining in parallel the resultant resistance i...

    Text Solution

    |

  12. A potentiometer having the potential gradient of 2 mV//cm is used to m...

    Text Solution

    |

  13. The n rows each containinig m cells in series are joined parallel. Max...

    Text Solution

    |

  14. A 100 V voltmeter of internal resistance 20 k Omega in series with a h...

    Text Solution

    |

  15. A cell supplies a current i(1) trhough a resistnace R(1) and a current...

    Text Solution

    |

  16. Out of five resistance of ROmega each 3 are connected in parallel and ...

    Text Solution

    |

  17. Two batteries A and B each of e.m.f. 2 V are connected in series to a...

    Text Solution

    |

  18. For a cell of e.m.f. 2 V , a balance is obtained for 50 cm of the po...

    Text Solution

    |

  19. AB is a potentiometer wire of length 100 cm and its resistance is 10Om...

    Text Solution

    |

  20. Equivalent resistance between the points A and B (in Omega) .

    Text Solution

    |