Home
Class 12
PHYSICS
Two infinitely long solenoids (shown in ...

Two infinitely long solenoids (shown in cross-section) pass through a circuit as shown in the figure. The magnitude of `vec(B)` inside each is the same and is increasesing at the rate of `I00T//sec` . What is the current in each resistor ?

Text Solution

Verified by Experts

Flux in left loop `phi_(1)Bpir_(1)^(2)`
`e_(1)=(dphi_(1))/(dt)=(dB)/(dt)pir_(1)^(2)(100)pi(0.1)^(2)=piV`
Flux is increasing, current will be anticlockwise
Flux in right loop
`phi_(2)=Bpir_(2)^(2)`
`e_(2)=(dphi_(2))/(dt)=(dB)/(dt)pir_(2)^(2)(100)pi(0.15)^(2)=2.25piV`
Flux is increasing, current will be clockwise
`e=((e_1)/(r_1)+(e_2)/(r_2))/((1)/(r_1)+(1)/(r_2))=((pi)/(6)+(2.25pi)/(5))/((1)/(6)+(1)/(5))=((18.5pi)/(30))/((11)/(30))`
`=(18.5pi)/(11)V`
`i=(e)/(3+r)=(18.5pi//11)/(3+(30)/(11))=(18.5pi)/(63)=0.92A`
`p.d` . across `3Omega=ixx3`
`=0.92xx3=2.76V`
`e_(1)-i_(1)r_(1)=2.76`
`pi-i_(1)xx6=2.76` implies `i_(1)=0.06A`
`e_(2)-i_(2)r_(2)=2.76`
`2.25pi-i_(2)xx5=2.76` implies `i_(2)=0.86A`

Promotional Banner

Topper's Solved these Questions

  • ELECTROMAGNETIC INDUCTION

    CP SINGH|Exercise EXERCISES|141 Videos
  • CURRENT ELECTRICITY

    CP SINGH|Exercise Exercise|137 Videos
  • ELECTROMAGNETIC WAVES

    CP SINGH|Exercise EXERCISES|21 Videos

Similar Questions

Explore conceptually related problems

Two infinitely long wires each carrying current I along the same direction are made into the geometry as shown in the figure. The magnetic field at the point P is

For the circuit shown in the figure , find the voltage across 10Omega resistor and the current passing through it .

one of the two infinitely long wires carrying current I is bent as shown in the adjacent figure. The magnetic induction at C is equal to

A electrical circuit is shown in the figure. The value of current I passing through the battery is (all quantities are in SI units)

An infinite long solenoid having n turns per unit length is shown in figure. The magnetic field at P, when a current I is flowing through it would be

For the circuit shown in figure, find the voltage acrss 10Omega resistor and the current passing through it.

A current of I=10 A is passed through the part of a circuit shown in the figure . What will be the potential difference between A and B when I is decreased at constant rate of 10^(2) amp/s at the beginning ?

Arrange the order of power dissipated in the given circuits, if the same current is passing through the system. The resistance of each resistor is 'r'.

CP SINGH-ELECTROMAGNETIC INDUCTION-EXERCISES
  1. Two infinitely long solenoids (shown in cross-section) pass through a ...

    Text Solution

    |

  2. The direction of induced current in the loop

    Text Solution

    |

  3. A current-carrying wire is placed, below a coil in its plane, with cur...

    Text Solution

    |

  4. A wire is bent to form the double loop shown in figure. There is a uni...

    Text Solution

    |

  5. Two different wire loops are concentric and lie in the same plane. The...

    Text Solution

    |

  6. A bar magnet is moved along the axis of a copper ring placed far away ...

    Text Solution

    |

  7. Consider the situation shown in . if the switch is closed and after so...

    Text Solution

    |

  8. Solve the previous question if the closed loop is completely enclosed ...

    Text Solution

    |

  9. As shown in the figure, P and Q are two coaxial conducting loops separ...

    Text Solution

    |

  10. shows a horizontal solenoid connected to a battery and a switch. A cop...

    Text Solution

    |

  11. An aluminium ring B faces an electromagnet A. The current I through A ...

    Text Solution

    |

  12. A conduting ring R is placed on the axis of a bar magnet M . The plane...

    Text Solution

    |

  13. Two circular loops of equal radii are placed coaxially at some separat...

    Text Solution

    |

  14. Two identical coaxial circular loops carry a current i each circulatin...

    Text Solution

    |

  15. Two circular coil P and Q are arranged coaxially as shown. The sign co...

    Text Solution

    |

  16. Two circular loops P and Q are placed with their planes paraller to ea...

    Text Solution

    |

  17. A small, conducting circular loop is placed inside a long solenoid car...

    Text Solution

    |

  18. A small magnet M is allowed to fall through a fixed horizontal conduct...

    Text Solution

    |

  19. In the previous question, the directions of the current flowing in the...

    Text Solution

    |

  20. A copper ring having a cut such as not to from a complete loop is held...

    Text Solution

    |

  21. Lenz's law is consequence of the law of conservation of

    Text Solution

    |