Home
Class 12
PHYSICS
The time constant of an inductance coil ...

The time constant of an inductance coil is `5 xx 10^(-3) sec`. When a 90 ohm resistance is joined in series , the time constant becomes `0.5 xx 10^(-3) sec`. The inductance and resistance of the coil are ,

A

`50 mH , 20 Omega`

B

`50 mH , 10 Omega`

C

`20 mH , 50 Omega`

D

`10 mH , 50 Omega`

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • MECHANICAL PROPERTIES OF SOLIDS AND FLUIDS

    SIA PUBLICATION|Exercise M.C.Q.|107 Videos

  • MOCK TEST 2

    SIA PUBLICATION|Exercise Chemistry|1 Videos

Similar Questions

Explore conceptually related problems

The time constant of inductance coil is 3 ms. When a 90 omega resistance is joined in series, then the time constant becomes 0.5 ms. The inductance and the resistance of the coil are

K_b of a monoacidic base BOH is 2 xx 10^(-5) . When BOH is neutralised with HCI, what is the equilibrium constant?

The rate constant for a reaction is 2.05xx10^(-5) mole "lit"^(-1)."sec"^(-1) . The rection obeys ……order

The dissociation constant of water at 10^(@) C is 5.31 xx 10^(-17) . The ionic product of water is

A technician has only two resistance coils. By using them singly in series or in parallel, he is able to obtain the resistance 1.5, 2, 6 and 8 ohms. The resistance of two coils are

The activity of a radionuclide (X^(100)) is 6.023 curie . If the disintegration constant is 3.7 xx 10^(4) sec^(-1) , the mass of the radionuclide is :

SIA PUBLICATION-MOCK TEST 1-PHYSICS
  1. A body is projected with a velocity of 10 m//s at 45^(@) to the horizo...

    Text Solution

    |

  2. One end of uniform glass capillary tube of radius r = 0.05 cm is immer...

    Text Solution

    |

  3. An organ pipe P (1) , closed at one end and containing a gas of densit...

    Text Solution

    |

  4. A sonometer wire has a length of 114 cm , between two fixed ends. Wher...

    Text Solution

    |

  5. For a certain organ pipe three successive resonance frequencies are ob...

    Text Solution

    |

  6. What is the deviation angle when light incident at an angle 45^(@) on ...

    Text Solution

    |

  7. When the temperature is increased (i)Viscosity of the gas increases ...

    Text Solution

    |

  8. An electric field is acting vertically upwards . A particle of mass 1 ...

    Text Solution

    |

  9. Identify the correct order of the following particles when arrenged in...

    Text Solution

    |

  10. A bar magnet of moment M is bent as an arc . Its magnetic moment

    Text Solution

    |

  11. In Young's double slit experiment how many maximas can be obtained on ...

    Text Solution

    |

  12. Consider the following statements A and B and identify the correct cho...

    Text Solution

    |

  13. The cold junction of a thermocouple is 0^(@)C. The ratio of thermo emf...

    Text Solution

    |

  14. A 6 V cell with 1 ohm internal resistance and 10 V cell with 2 ohm int...

    Text Solution

    |

  15. The time constant of an inductance coil is 5 xx 10^(-3) sec. When a 90...

    Text Solution

    |

  16. The threshold wavelength for certain metal is lambda (0). When a light...

    Text Solution

    |

  17. Ratio of magnetic field at the centre af a current carrying coil of ra...

    Text Solution

    |

  18. A electron and a position pair is produced by a gamma ray of 3.4 MeV ....

    Text Solution

    |

  19. For an n-p-n transistor beta = 50 , the value of alpha is

    Text Solution

    |

  20. The absorption coefficient of a material is (3)//(4) . The ratio of ma...

    Text Solution

    |