Home
Class 12
PHYSICS
In a meter bridge experiment null point ...

In a meter bridge experiment null point is obtained at 20 cm. from one end of the wire when resistance X is balanced against another resistance Y. If XltY, then where will be the new position of the null point from the same end, if one deicdes to balance a resistance of 4 X against Y?

A

50 cm

B

80 cm

C

40 cm

D

70 cm

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • TEXTUAL QUESTIONS

    MODERN PUBLICATION|Exercise EXERCISE|507 Videos

  • STRUCTURE OF NUCLEUS

    MODERN PUBLICATION|Exercise EXERCISE|47 Videos

  • TEXUAL QUESTIONS

    MODERN PUBLICATION|Exercise EXERCISE|195 Videos

Similar Questions

Explore conceptually related problems

In comparing the resistance of two cells P and Q with a sides wire bridge, a balance point is obtained when the sliding contact is 30 cm from the zero end of the wire. The resistances P and Q are interchanged and the balance is obtained at 120 cm from the same emf. Find the ratio of the resistance P and Q and the length of the bridge wire

In an experiment to determine the internal resistance of a cell, the null point is obtained at 2 cm, when the cell is shnted by a resistance of 5Omega . When the cell is shunted by a resistance of 20Omega , the null point is obtained at 3 cm. Find the internal resistance of the cell.

With two resistance R_1 and R_2 (>R_1) in the two gaps of a metre bridge the balance was found to be 1/3 m from the zero end. When a 6 Omega resistance is connected in series with the smaller of the two resistance, the point is shifted to 2/3 m from the same end, then R_1 and R_2 Find the resistance of the two wires.

In a metre bridge [Fig. 3.27], the balance point is found to be at 39.5 cm from the end A, when the resistor Y is of 12.5 Omega Determine the resistance of X. Why are the connections between resistors in a Wheatstone or meter bridge made of thick copper strips?:

In a metre bridge, the balance point is found to be at 39.5 cm from the end A, when the resistor Y is of 12.5 Omega . Determine the resistance of X. Made of thick copper strips? Determine the balance point of the bridge above if X and Y are interchanged. What happens if the galvanometer and cell are interchanged at the balance point of the bridge ? Would the galvanometer show any current?

In a meter-bridge experiment with a resistance R_(1) in left gap and a resistance X in a right gap. null point is obtained at 40 cm from the left emf. With a resistance R_(2) in the left gap, the null point is obtainned at 50 cm from left hand. Find the position of the left gap is containing R_(1) and R_(2) in series.

MODERN PUBLICATION-TEXTUAL QUESTIONS-EXERCISE
  1. A 5V battery with internal resistance2Omega and a 2V battery with inte...

    Text Solution

    |

  2. The total current supplied to the circuit by the battery is

    Text Solution

    |

  3. In a meter bridge experiment null point is obtained at 20 cm. from one...

    Text Solution

    |

  4. In a potentiometer experiment , the balancing with a cell is at length...

    Text Solution

    |

  5. The length of a wire of a potentiometer is 100 cm, and the e.m.f. of i...

    Text Solution

    |

  6. The mean free path of electrons in a metal is 4xx10^-8m. eY energy to ...

    Text Solution

    |

  7. From the graph between current (I) and voltage (V) as shown in the fig...

    Text Solution

    |

  8. The electric resistance of a certain wire of ron is R. If its length a...

    Text Solution

    |

  9. The copper wires of elngths and cross-sectional areas are (l,A), (2l,A...

    Text Solution

    |

  10. A wire of resistance 10Omega is elongated by 10%. The resistance of th...

    Text Solution

    |

  11. A wire of certain material is stretched slowly by 10% its new resistan...

    Text Solution

    |

  12. The specific resistance of a condutor increases with

    Text Solution

    |

  13. Si and Cu are cooled from 300 K to a temperative of 60 K. Then resisti...

    Text Solution

    |

  14. What is a fuse wire? What is its material? Give the characteristics of...

    Text Solution

    |

  15. 1 kW h is equal to

    Text Solution

    |

  16. An electric bulb marked 40W-200 V is used in a circuit of supply volta...

    Text Solution

    |

  17. When three identical bulbs of 60 watt-200 volt rating are connected in...

    Text Solution

    |

  18. In India electricity is supplied for domestic use at 220 V. It is supp...

    Text Solution

    |

  19. An electric kettle takes 4 A current at 220 V. How much time will it t...

    Text Solution

    |

  20. Power dissipated across the 8 Omega resistor in the circuit shown here...

    Text Solution

    |