Home
Class 12
PHYSICS
An inductor coil carries a steady state...

An inductor coil carries a steady state current of 2.0 A when connected across an ideal battery of emf 4.0 V. if its inductance is 1.0 H, find the time constant of the circuit.

Text Solution

Verified by Experts

here`i=2A,E=4V, L=1H`
`:. R=(E/i)=(4/2)=2 Omega`
`i=L/R=1/2=0.5A`.
Promotional Banner

Topper's Solved these Questions

  • ELECTROMAGNETIC INDUCTION

    HC VERMA|Exercise Objective 2|10 Videos

  • ELECTRIC FIELD AND POTENTIAL

    HC VERMA|Exercise Exercises|75 Videos

  • ELECTROMAGNETIC WAVES

    HC VERMA|Exercise Exercise|9 Videos

Similar Questions

Explore conceptually related problems

An inductor coil of resistance 10 Omega and inductance 120 mH is connected across a battery of emf 6 V and internal resistance 2 Omega . Find the charge which flows through the inductor in (a) 10 ms, (b) 20ms and (c ) 100ms after the connections are made.

A parallel-plate capacitor with plate are 20cm^(2) and plate separation 1.0mm is connected to a battery .The resistance of the circuit is 10k(Omega) .Find the time constant of the circuit.

An LR circuit having a time constant of 50 ms is connected with an ideal battery of emf epsilon . Find the time taken for the magnetic energy stored in the circuti to change from one fourth of the steady state value to half of the steady stae value.

Two coil A and B have inductances 1.0 H and 2.0 H respectively. The resistance of each coil is 10 Omega . Each coil is connected to an ideal battery of emf 2.0 V at t = 0 Let i_A and i_B be the current in the two circuit at time t. Find the raito i_A/ I_B at (a) t=100ms, (b) t= 200 ms and (c ) t = 1 s.

an inductor of inductance 2.00 H is joined in series with a resistor of resistance 200 Omega and a battery of emf 2.00 V. At t = 10 ms, find (a) th current in the circuit, (b) the power delivered by the batter, (c ) the power dissipated in heating the resistor and (d) the rate at which energy is being stored in magnetic field.

A capacitor of capacitance as C is given a charge Q. At t=0 ,it is connected to an ideal battery of emf (epsilon) through a resistance R. Find the charge on the capacitor at time t.

A coil having inductance 2.0 H and resistance 20 Omega is connected to a battery of emf 4.0 V. Find (a) the current a the instant 0.20 s after the connection Is made and (b) the magnetic energy at this instant.

An inductor coil joined to a 6 V battery draws a steady current of 12 A . This coil is connected to a capacitor and an AC source of rms voltage 6 V in series. If the current in the circuit is in phase with the emf, find the rms current.

An inductor of self inductance 12 H carries a steady current of 2A. How can a 60V self-induced e.m.f. be made to appear in the inductor?

An inductor coil of inductance 17 mH is constructed from a copper wire of length 100 m and cross - sectional are 1mm^2 . Calculate the time constant of the circuit if this inductor is joined across an ideal battery. The resistivity of copper = 1.7 X 10^(-8) Omega m.

HC VERMA-ELECTROMAGNETIC INDUCTION-EXERCISE
  1. The current in a solenoid of 240 turns, having a length of 12 cm and ...

    Text Solution

    |

  2. Find the value of t/tau for which the current in an LR circuit builds ...

    Text Solution

    |

  3. An inductor coil carries a steady state current of 2.0 A when connect...

    Text Solution

    |

  4. A coil having inductance 2.0 H and resistance 20 Omega is connected t...

    Text Solution

    |

  5. A coil of resistance 40 Omega is connected across a 4.0 V battery. 0...

    Text Solution

    |

  6. An inductor of inducance 5.0 H, having a negligible resistance, is con...

    Text Solution

    |

  7. The time constant of an LR circuit is 40 ms. The circuit is connected...

    Text Solution

    |

  8. An LR circuit has L = 1.0 H R =20 Omega. It is connected across an e...

    Text Solution

    |

  9. What are the values of the self induced emf in the circuit of the pr...

    Text Solution

    |

  10. An inductor-coil of inductance 20 mH having resistance 10 Omega is jo...

    Text Solution

    |

  11. An LR circuit constains an inductor of 500 mH, a resistor of 25.O Om...

    Text Solution

    |

  12. An inductor coil of resistance 10 Omega and inductance 120 mH is conn...

    Text Solution

    |

  13. An inductor coil of inductance 17 mH is constructed from a copper wire...

    Text Solution

    |

  14. An LR circuit having a time constant of 50 ms is connected with an ide...

    Text Solution

    |

  15. A coil having an inductance L and a resistance R is connected to a bat...

    Text Solution

    |

  16. A solenoid having inductance 4.0 H and resistance 10 <span>&#8486;</sp...

    Text Solution

    |

  17. The magnetic field at a point inside a 2.0 mH inductor coil becomes 0...

    Text Solution

    |

  18. An LR circuit with emf epsilon is connected at t = 0. (a) find the cha...

    Text Solution

    |

  19. an inductor of inductance 2.00 H is joined in series with a resistor o...

    Text Solution

    |

  20. Two coil A and B have inductances 1.0 H and 2.0 H respectively. The...

    Text Solution

    |