Home
Class 12
PHYSICS
Assertion: meterbridge wire is made up o...

Assertion: meterbridge wire is made up of manganin
Reason: The temperature coefficient of resistance is very small for manganin

A

Both (A) and (R) are true and (R) is the correct explanantion of A.

B

Both (A) and (R) are true but (R) is not the correct explanation of A.

C

(A) is true but (R) is false

D

(A) is false but (R) is true.

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • CURRENT ELECTRICITY

    NARAYNA|Exercise Level 1 C.W|64 Videos

  • CURRENT ELECTRICITY

    NARAYNA|Exercise Level 1 H.W|63 Videos

  • CURRENT ELECTRICITY

    NARAYNA|Exercise Level 6|43 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

Potentiometer wire is made of manganin because it has

Assertion: Material used in the construction of a standard resistance is constantan or manganin. Reason: Temperatures coefficient of constan is very small.

Statement I : Material used in the construction of a standard resistance is constantan or manganin. Statement II : Its temperature coefficient of resistance is very small.

Assertion (A): Meter bridge wire is generally made of Constantan. Reason (R ): Constantan has a very low temperature coefficient of resistance.

The resistivity of alloy manganin is

Assertion : A pure semiconductor has negative temperature coefficient of resistance. Reason: On raising the temperature, more charge carriers are released,. conductance increases and resistance decreases.

Assertion : The connecting wires are made of copper. Reason : The electrical conductivity of copper is high

NARAYNA-CURRENT ELECTRICITY-C.U.Q
  1. In meter brigde of Wheatstone bridge for measurment of resistance, the...

    Text Solution

    |

  2. In a metre-bridge experiment, when the resistances in the gaps in the ...

    Text Solution

    |

  3. Assertion: meterbridge wire is made up of manganin Reason: The tempe...

    Text Solution

    |

  4. Potentiometer is superior to voltmeter because

    Text Solution

    |

  5. In comparing emf's of 2 cells with the helf of potentiometer, at the b...

    Text Solution

    |

  6. A potentiometer wire is connectd across the ideal battery now, the rad...

    Text Solution

    |

  7. In a potentiometer of ten wires each of 1m, the balance point is obtai...

    Text Solution

    |

  8. If the emf of the cell in the primary circuit is doubled, with out cha...

    Text Solution

    |

  9. The potential gradients on the potentiometer wire are V(1) and V(2) wi...

    Text Solution

    |

  10. If the current in the primary circuit is decreased, then balancing len...

    Text Solution

    |

  11. Temperature coefficient of resistance alpha and resistivity rho of a p...

    Text Solution

    |

  12. A series high resistance is preferable than shunt resistance in the ga...

    Text Solution

    |

  13. Sensitivity of potentiometer can be increased by

    Text Solution

    |

  14. A cell of emf E and internal resistance r connected in the secondary g...

    Text Solution

    |

  15. Potentiometer is an ideal instrument because

    Text Solution

    |

  16. On increasing the resistance of the primary circuit of potentiometer, ...

    Text Solution

    |

  17. If the value of potential gradient on potentiometer wire is decreased,...

    Text Solution

    |

  18. A cell of negligible internal resistance is connected to a potentiomet...

    Text Solution

    |

  19. For a potentiometer to function, the emf of the cell (E) in the primar...

    Text Solution

    |

  20. The balancing lengths of potentiometer wire are l(1) and l(2) when two...

    Text Solution

    |