Home
Class 12
PHYSICS
A coil of 40 henry inductance is connect...

A coil of 40 henry inductance is connected in series with a resistance of 8 ohm and the combination is joined to the terminals of a 2 volt battery. The time constant of the circuit is :-

A

`1/5 sec`

B

40 sec

C

20 sec

D

5 sec

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • ELECTROMAGNETIC INDUCTION & ALTERNATIVE CURRENT

    VMC MODULES ENGLISH|Exercise IMPECCABLE|52 Videos
  • ELECTROMAGNETIC INDUCTION & ALTERNATIVE CURRENT

    VMC MODULES ENGLISH|Exercise ENABLE|50 Videos
  • ELECTROMAGNETIC INDUCTION & ALTERNATING CURRENT

    VMC MODULES ENGLISH|Exercise IN-CHAPTER EXERCISE-G|10 Videos
  • ELECTROSTATICS

    VMC MODULES ENGLISH|Exercise JEE Advanced (Archive)|89 Videos

Similar Questions

Explore conceptually related problems

A coil of 40 H inductance is connected in series with a resistance of 8 ohm and the combination is joined to the terminals of a 2 V battery. The time constant of the circuit

A capacitor of capacitance 1muF is connected in parallel with a resistance 10Omega and the combination is connected across the terminals of a battery of EMF 50 V and internal resistance 1Omega . The potential difference across the capacitor at steady state is (in Volt)

An inductance and a resistance are connected in series with an AC potential . In this circuit

A coil of inductive reactance 31 Omega has a resistance of 8 ohm . It is placed in series with a condenser of capacitive reactance 25 Omega . The combination is connected to an ac source of 110 V . The power factor of the circuit is

A coil of inductive reactance 31 Omega has a resistance of 8 ohm . It is placed in series with a condenser of capacitive reactance 25 Omega . The combination is connected to an ac source of 110 V . The power factor of the circuit is

A condenser of capacity 1 mu F and a resistance 0.5 mega-ohm are connected in series with a DC supply of 2 V. The time constant of circuit is

A coil of inductive reactance 31 Omega has a resistance of 8 Omega . It is placed in series with a condenser of capacitive reactance 25 Omega . The combination is connected to an ac source of 110 V . The power factor of the circuit is

The figure below shows a battery of emf epsilon connected to an inductor L and resistance R in series. If the switch is closed at t=0, then the total charge that flows from the battery in time constant of the circuit is

A coil of inductance 0.20 H is connected in series with a switch and a cell of emf 1.6 V . The total resistance of the circuit is 4.0 Omega . What is the initial rate of growth of the current when the switch is closed?

A uniformly wound long solenoid of inductance L and resistance R is cut into two parts in the ratio eta:1 , which are then connected in parallel. The combination is then connected to a cell of emf E . The time constant of the circuit is

VMC MODULES ENGLISH-ELECTROMAGNETIC INDUCTION & ALTERNATIVE CURRENT -EFFICIENT
  1. An e.m.f. of 12 "volts" is induced in a given coil when the current in...

    Text Solution

    |

  2. An electron moves along the line AB which lies in the same plane as a ...

    Text Solution

    |

  3. A circular coil of mean radius of 7 cm and having 4000 turns is rotate...

    Text Solution

    |

  4. The core of any transformer is laminated so as to

    Text Solution

    |

  5. The ratio of secondary to the primary turns in a transformer is 3:2 . ...

    Text Solution

    |

  6. Mutual inductance of two coils depends on their self inductance L(...

    Text Solution

    |

  7. In transformer , power of secondary coil is :

    Text Solution

    |

  8. If a copper ring is moved quickly towards south pole of a powerful sta...

    Text Solution

    |

  9. The magnetic flux through Circuit of resistance R chages by an a...

    Text Solution

    |

  10. A coil of 40 henry inductance is connected in series with a resistance...

    Text Solution

    |

  11. Which of the following is correct for sinusoidal electromagnetic i...

    Text Solution

    |

  12. If number of turns of 70 cm^(2) coil is 200 and it is placed in a m...

    Text Solution

    |

  13. When current in coil is uniformely reduced from 2A to 1A in 1 ms , the...

    Text Solution

    |

  14. If the input voltage of a transformer is 2500 volts and output cur...

    Text Solution

    |

  15. A step up transformer has turn ratio 10:1 . A cell of e.m.f 2 volt...

    Text Solution

    |

  16. A coil of inductance 300 mH and resistance 2Omega is conneted to a sou...

    Text Solution

    |

  17. A Conducting ring of radius 1 meter is placed in an uniform magnetic f...

    Text Solution

    |

  18. The average power is dissipated in a pure inductor is

    Text Solution

    |

  19. The working of dynamo is based on principle of

    Text Solution

    |

  20. D.C motor run of 120 V . If armature current at e(b) = 115 V is 10 ...

    Text Solution

    |