Home
Class 12
PHYSICS
Consider the circuit shown in .(a) find ...

Consider the circuit shown in .(a) find the current through the battery a long time after the switch S is closed. (b) Suppose the switc is again opened at t = 0. What is the time cosstant of the discharging circuit? (c ) Find t current through the inductor after one time constant.

Text Solution

Verified by Experts

(a) The inductor does not work in DC (When switch is closed)
Thus effect of inductance vanishes.
`i= (E )/(R_(net))`
`==(E )/(((R_1)+(R_(2)))/((R_1)+(R_(2)))) (E(R_1+R_(2)))/(R_1R_(2)`
(b) When the switch is opened the resistance are in series.
(tau)=(L)/(R_(net))=(L)/(R_1+R_(2))`.
Promotional Banner

Topper's Solved these Questions

  • ELECTROMAGNETIC INDUCTION

    HC VERMA|Exercise EXERCISE|9 Videos

  • ELECTROMAGNETIC INDUCTION

    HC VERMA|Exercise Objective 2|10 Videos

  • ELECTRIC FIELD AND POTENTIAL

    HC VERMA|Exercise Exercises|75 Videos

  • ELECTROMAGNETIC WAVES

    HC VERMA|Exercise Exercises|9 Videos

Similar Questions

Explore conceptually related problems

Consider the shown circuit. The capacitor is uncharged when the swith is closed at time t=0. Which of the circuit given in option is equivalent to the shown circuit as t approaches infinity?

Assertion:- Time constants of the cirucits shown in the figure are same. Reason:- Instantaneous current through the capacitor branch is same at any instant for both the circuits, if batteries are inserted in the circuits at t=0

Consider a magnet surrounded by a wire with an on/off switch S as shown in figure. If the switch is thrown from the off position (open circuit) to the on position (closed circuit), will a current flow in the circuit ? Explain.

In the given circuit switch S_(2) is Kept closed and S_(1) is kept open for a very long time such that the system is in steady- state . Now S_(1) is also slosed keeping S_(2) closed. Current passing through inductor L time after S_(1) is closed , is :

A cell sends a current through a resistance R_(1) for time t , next the same cell sends current through another resistance R_(2) for the time t If the same amount of heat is developed in both the resistance then find the internal resistance of the cell

A light bulb and an open coil inductor are connected to an ac source through a key as shown in Fig. The switch is closed and after sometime, an iron rod is inserted into the interior of the inductor. The glow of the light bulb (a) increases, (b) decreases, (c) is unchanged, as the iron rod is inserted. Give your answer with reasons.

Consider a simple circuit shown in figure stands for a variable resistance R. R can very from R_(0) to infinity. r is internal resistance of the battery (r lt lt R lt lt R_(0) ) . (a) Potential drop across AB is nearly constant as R' is varied. (b) Current through R' is nearly a constant as R' is varied. (c) Current I depends sensitively on R'. (d) I ge (V)/(r + R) always.

Two blocks each of mass m, connected by an un-stretched spring are kept at rest on a frictionless horizontal surface. A constant force F is applied on one of the blocks pulling it away from the other as shown in figure. (a)Find accelaration of the mass center. (b) Find the displacement of the centre of mass as function of time t. (c) If the extension of the spring is X_(0) at an instant t, find the displacements of the two blocks relative to the ground at this instant.

In the given circuit switch S_(2) is Kept closed and S_(1) is kept open for a very long time such that the system is in steady- state . Now S_(1) is also slosed keeping S_(2) closed. Current passing through R just after S_(1) is closed , is :

In the following circuit A, B and C are three ammeters. 0.5A current is shown by ammeter B. Find the total resistance of the circuit.

HC VERMA-ELECTROMAGNETIC INDUCTION-Exercises
  1. An LR circuit has L = 1.0 H R =20 Omega. It is connected across an e...

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

  7. A solenoid having inductance 4.0 H and resistance 10 Omega is connecte...

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

  12. The current in a discharging LR circuit without the battery drops from...

    Text Solution

    |

  13. A constant current exists in an inductor coil connected to a battery. ...

    Text Solution

    |

  14. Consider the circuit shown in .(a) find the current through the batter...

    Text Solution

    |

  15. A current of 1.0 A is established in a tightly wound solenoid radius...

    Text Solution

    |

  16. Consider a small cube of volume 1 mm ^3 at the centre of a circular l...

    Text Solution

    |

  17. A long wire carries a current of 4.00 A. Find the energy stored in the...

    Text Solution

    |

  18. The mutual inductance between two coils is 2.5 H. If the current in on...

    Text Solution

    |

  19. A solenoid of length 20cm, area of cross- section 4.0 cm^2 and having ...

    Text Solution

    |

  20. The current in a long solenoid of radius R and having n turns per unit...

    Text Solution

    |