Home
Class 12
PHYSICS
Two unknown resistances are connected in...

Two unknown resistances are connected in two gaps of a meter-bridge. The null point is obtained at 40 cm from left end. A `30Omega` resistance is connected in series with the smaller of the two resistances, the null point shifts by 20 cm to the right end. The value of smaller resistance in `Omega` is

A

12

B

24

C

36

D

48

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • NTA NEET SET 91

    NTA MOCK TESTS|Exercise PHYSICS|45 Videos
  • NTA NEET SET 93

    NTA MOCK TESTS|Exercise PHYSICS|45 Videos
NTA MOCK TESTS-NTA NEET SET 92-PHYSICS
  1. The figure shows the total acceleration a = 32 m s^(-2) of a moving p...

    Text Solution

    |

  2. A short bar magnet has a magnetic moment of 0.48 JT^(-1). Give the dir...

    Text Solution

    |

  3. Two unknown resistances are connected in two gaps of a meter-bridge. T...

    Text Solution

    |

  4. A long resistance wire is divided into 2n parts. Then n parts are conn...

    Text Solution

    |

  5. A charge q is placed at the centre of the line joining two equal charg...

    Text Solution

    |

  6. Two point charges q and –q are at positions (0,0,d) and (0,0, –d) resp...

    Text Solution

    |

  7. What is the value of inductance L for which the current is a maximum i...

    Text Solution

    |

  8. Some magnetic flux is changed from a coil of resitance 10 Omega. As a ...

    Text Solution

    |

  9. For a satellite escape velocity is 11 km/s . If the satellite is launc...

    Text Solution

    |

  10. For particles of equal masses M that move along a circle of radius R u...

    Text Solution

    |

  11. Four rods with different radii r and length l are used to connect two ...

    Text Solution

    |

  12. The relation between efficiency 'eta' of a heat engine and the co-effi...

    Text Solution

    |

  13. In an adiabatic expansion of 2 moles of a gas, the change in its inter...

    Text Solution

    |

  14. Two circular coils X and Y, having equal number of turns and carrying ...

    Text Solution

    |

  15. Two ions having masses in the ratio 1 : 1 and charges 1 : 2 are projec...

    Text Solution

    |

  16. Two children Ramesh (on path ARB) and Sohan (on path ASB), travel down...

    Text Solution

    |

  17. A boat crosses a river with a velocity of 8(km)/(h). If the resulting ...

    Text Solution

    |

  18. A 24 kg block resting on a floor has a rope tied to its top. The maxim...

    Text Solution

    |

  19. The coefficient of static friction, mu(s) between block A mass 2kg and...

    Text Solution

    |

  20. .(92)^(238)U has 92 protons and 238 nucleons. It decays by emitting an...

    Text Solution

    |