Home
Class 12
PHYSICS
In the circuit shown in the figure initi...

In the circuit shown in the figure initialy the switch in position 1 for a long time, then suddenly at `t=0` the switch is shifted to position 2. It is required that a constant current should flow in the circuit, the value of resistance `R` in the circuit

A

should be decreased at constant ratee

B

should be increased at a constant rate

C

should be maintained constant

D

not possible

Text Solution

Verified by Experts

The correct Answer is:
D

In decay of current though `L-R` circuit, current can not remain constant.
Promotional Banner

Topper's Solved these Questions

  • ELECTROMAGNETIC INDUCTION

    DC PANDEY|Exercise Level 2 More Than One Correct|10 Videos
  • ELECTROMAGNETIC INDUCTION

    DC PANDEY|Exercise Level 2 Comprehension Based|13 Videos
  • ELECTROMAGNETIC INDUCTION

    DC PANDEY|Exercise Level 1 Subjective|21 Videos
  • CURRENT ELECTRICITY

    DC PANDEY|Exercise Medical entrances gallery|97 Videos
  • ELECTROMAGNETIC WAVES

    DC PANDEY|Exercise Sec C|22 Videos

Similar Questions

Explore conceptually related problems

In the circuit shown, initially the switch is in position 1 for a long time. Then the switch is shifted to position 2 for a long time. Find the total heat produced in R_(2)

In figure, the switch is in the position 1 for long time, then the switch is shifted to position 2 at t=0 . At this instant the value of i_1 and i_2 are

In the circuit shown, the switch has been in position 1 for a long time. Now the switch is shifted to position 2. If this instant is taken as t = 0, then at time t=(pi)/(2)

In the circuit as shown in figure the switch is closed at t = 0 . A long time after closing the switch

In the circuit as shown in the figure, switch S is added at t=0. Then:

In the circuit shown in Fig. 12.3, when the switch is moved to ‘ON’ position

In the circuit shown in the figure, the switch S is in position 1 for a long time. Now the switch is thrown to position 2. Find the total heat developed in the circuit till the steady state is reached again.

Switch is in position A for long time. At time t = 0 it is shifted to position B. Find the maximum charge that will accumulate on capacitor

In the circuit shown in the figure, if switches S_(1) and S_(2) have been closed for a long time, then charge on the capacitor.

In the circuit shown in figure switch S is thrown to position 1 at t=0 . when the current in the resistort is 1A , it is shifted to position 2. the total heat generated in the circuit after shifting to position 2 is

DC PANDEY-ELECTROMAGNETIC INDUCTION-Level 2 Single Correct
  1. Two circular loops P and Q are concentric and coplanar as shown in fig...

    Text Solution

    |

  2. In the circuit shown in figure, the switch S is closed at t=0. If VL i...

    Text Solution

    |

  3. In the figure shown as uniform magnetic field |B|=0.5T is perpendicula...

    Text Solution

    |

  4. The figure shows a non conducting ring of radius R carrying a charge q...

    Text Solution

    |

  5. A conducnting straight wire PQ of length l is fixed along as diameter ...

    Text Solution

    |

  6. A uniformly wound long solenoid of inductance L and resistance R is cu...

    Text Solution

    |

  7. When a choke coil carrying a steady current is short circuited, the cu...

    Text Solution

    |

  8. In the steady state condition the rate of heat produced in a choke coi...

    Text Solution

    |

  9. In the circuit shown in the figure initialy the switch in position 1 f...

    Text Solution

    |

  10. The figure shows an L-R circuit the time constant for the circuit is

    Text Solution

    |

  11. In figure, the switch is in the position 1 for long time, then the sw...

    Text Solution

    |

  12. In a decaying L-R circuit, the time after which energy stores in the i...

    Text Solution

    |

  13. Initially the switch is in positions 1 for as long time then shifted t...

    Text Solution

    |

  14. When the switch S is closed at t=0, identify the correct statement jus...

    Text Solution

    |

  15. Two metallic rings of radius R are rolling on a metallic rod. A magnet...

    Text Solution

    |

  16. In the figure, magnetic field points into the pane of paper and the co...

    Text Solution

    |

  17. Find the current passing through battery immediately after key (K) is ...

    Text Solution

    |

  18. In the circuit shown the key (K) is closed at t=0, the current through...

    Text Solution

    |

  19. A loop shown in the figure is immersed in the varying magnetic field B...

    Text Solution

    |

  20. A square loop of side as and a straight long wire are placed in the sa...

    Text Solution

    |