Home
Class 12
PHYSICS
One conducting U tube can slide inside a...

One conducting U tube can slide inside another as shown in figure, maintaining electrical contacts between the tubes. The magnetic field B is perpendicular to the plane of the figure. If each tube maoves towards the other at a constant speed v. Then the emf induced in the circuit in terms of B, l and v where l is the width of each tube will be

A

B l V

B

`-B l V`

C

zero

D

2B l V

Text Solution

Verified by Experts

The correct Answer is:
d
Promotional Banner

Topper's Solved these Questions

  • ELECTRO MAGNETIC INDUCTION

    MOTION|Exercise EXERCISE-4| Section A (Prevous Years Problems )|28 Videos

  • Electrical Instrument

    MOTION|Exercise EXERCISE -3|16 Videos

  • ELECTRO MAGNETIC WAVES

    MOTION|Exercise EXERCISE - 3 (SECTION - B)|8 Videos

Similar Questions

Explore conceptually related problems

A conducting wire xy of lentgh l and mass m is sliding without friction on vertical conduction rails ab and cd as shown in figure. A uniform magnetic field B exists perpendicular to the plane of the rails, x moves with a constant velocity of

A wire is bent in the form of a V shape and placed in a horizontal plane.There exists a uniform magnetic field B perpendicular to the plane of the wire. A uniform conducting rod starts sliding over the V shaped wire with a constant speed v as shown in the figure. If the wire no resistance, the current in rod wil

A ring of radius R is rolling on a horizontal plane with constant velocity v. There is a constant and uniform magnetic field B which is perpendicular to the plane of the ring. Emf across the lowest point A and right-most point C as shown in the figure will

Figure shows a wire sliding on two parallel, conducting rails placed at a separation L . A magnetic field B exists in a direction perpendicular to the plane of the rails. What force is necessary to keep the wire moving at a constant velocity V ?

In the figure shown as uniform magnetic field |B|=0.5T is perpendicular to the plane of circuit. The sliding rod of length l=0.25 m moves uniformly with constant speed v=4ms^-1 . If the resistance of the sllides is 2Omega , then the current flowing through the sliding rod is

Each of the batteries shown in figure has an emf equal to 5 V. Show that the magnetic field B at the point P is zero for any set of values of the resistances .

a conducting wire os mass m slides down two smooth conducting bars, set at an angle theta to the horizontal as shown in . The separatin between the bars is l . The system is located in the magnetic field B , perpendicular to the plane of the sliding wire and bars. The constant velocity of the wire is

Figure shown a square loop of side l being moved towards right at a constant speed v . The front edge enters th emagnetic field B at t=0 . The width of field is 3l . Sketch induced emf versus time graph.

Imagine a would where free magnetic charges exist. In this world, a circuit is made with a U shape wire and a rod free to slide on it. A current carried by free magnetic charges can flow in the circuit. When the circuit is placed in a uniform electric field. E perpendicular to the plane of the plane of the circuit and the rod is pulled to the right with a constant speed v, the "magnetic EMF" in the current and the direction of the corresponding current. arising because of changing electric flux will be (l is the length of the rod and c is speed of light).

MOTION-ELECTRO MAGNETIC INDUCTION-EXERCISE-4| Section B (Prevous Years Problems )
  1. A metal conductor of length 1m rotates vertically about one of its end...

    Text Solution

    |

  2. A coil of inductance 300mh and resistance 2Omega is connected to a sou...

    Text Solution

    |

  3. One conducting U tube can slide inside another as shown in figure, mai...

    Text Solution

    |

  4. The flux linked with a coil at any instant 't' is given by phi = 10t^(...

    Text Solution

    |

  5. In an AC generator, a coil with N turns, all of the same area A and to...

    Text Solution

    |

  6. An inductor (L = 100 mH), a resistor (R = 100Omega) and a battery (E =...

    Text Solution

    |

  7. An ideal coil of 10H is connected in series with a resistance of 5(Ome...

    Text Solution

    |

  8. Two coaxial solenoids are made by winding thin insulated wire over a p...

    Text Solution

    |

  9. An inductor of inductance L=400mH and resistors of resistances R(1)=2 ...

    Text Solution

    |

  10. In the circuit shown below, the key K is closed at t =0. The current t...

    Text Solution

    |

  11. A rectangular loop has a sliding connector PQ of length l and resistan...

    Text Solution

    |

  12. A fully charged capacitor C with initial charge q(0) is connected to a...

    Text Solution

    |

  13. A horizontal straight wire 20 m long extending from east to west falli...

    Text Solution

    |

  14. A boat is moving due east in a region where the earth's magnetic field...

    Text Solution

    |

  15. A coil is suspended in a uniform magnetic field, with the plane of the...

    Text Solution

    |

  16. A metallic rod of length 'l' is tied to a string of length 2l and made...

    Text Solution

    |

  17. In the circuit shown here, the point C is kept connected to the point ...

    Text Solution

    |

  18. An inductor (L =0.03 H) and a resistor (R = 0.15k(Omega)) are connecte...

    Text Solution

    |

  19. An LCR circuit is equivalent to a damped pendulum In an LCR circuit th...

    Text Solution

    |

  20. In a coil of resistance 100 Omega , a current is induced by changing t...

    Text Solution

    |