Home
Class 12
PHYSICS
The current generator I g, shown in . Se...

The current generator `I _g`, shown in . Sends a constant current I through the circuit. The wire cd is fixed and ab is made to slide on the smooth, thick rails with a constant velocity v towards right. Each of these wire has resistance r. Find the current through the wire cd.

Text Solution

Verified by Experts

Initial Current passed =i
Hence initial emf=ir
emf due to motion of ab=Blv
Net emf =ir-Blv
Net resistance =2r
Hence Current passed =(ir-Blv)/(2r).`
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

Figure shows a wire ab of length L and resistance R which can slide on a smooth pair of rails. I_(g) is current generator which supplies a constant current i in the circuit. If the wire ab slide at a speed v towards right, find the potential difference below a and b (b) The current generator I_(g) show in the figure sends a constant current i through the circiut. The wire ab has a length L and mass m and can slide on the smooth horizontal rails connect to I_(g) . The entire system lies in a vertical magnetic field B . Find the velocity of the wire as a function of time. (c) The system containing the rails and the wire of the previous part is kept vertically in a uniform horizontal magnetic field B that is perpendicular to the plane of the rails (figure). If is found that the wire stays in equilibrium. If th ewire ab is replaced by another wire of double its mass, how long will lit take in falling through a distance equal to its length? The current generator I_(g) shown in figure sends a constant current i through the circuit. The wire cd is fixed and wire ab is made to slide on the smooth, thick rails with a constant velocity v toward right. Each of these wires has resistance r . Find the current through the wire cd .

Consider circuit as shown in figure. The current through wire AB is

Consider the situation shown in the figure. The wire Ab is sliding on the fixed rails with a constant velocity. If the wire AB is replaced by semicircular wire, the magnitude of the induced current will

Find the current ( in ampere) through wire XY of the circuit shown in figure.

A long U -shaped wire of width l placed in a perpendicular uniform and constant magnetic field B (figure).A wire of length l is slid on the U -shaped wire with a constant velocity v towards right.The resistance of all the wires is r per unit length.At t=0 , the sliding wire is close to the left edge of the fixed U -shaped wire.Draw an equivalent circuit diagram at time t , showing the induced emf as a battery.Calculate the current in the circuit.

The heat developed in an electric wire of resistance R by a current I for a time t is

A constant current of 4A passes through a wire for 8s . Find total charge flowing through that wire in the given time interval.

The potentiometer wire of resistance R is connected in series with a cell of e.m.f. E and of resistance R_(h) . The current flowing through the potentiometer wire is

What is the effect on the magnetic needle in Oersted's experiment, when (1) a current is passed through the wire (2) the current through the wire is increased (3) The current through the wire to stopped (4) The current through the wire is reversed (5) The distance between jthe magnetic needle and the wire is increased , keeping the current through the wire constant ?

Assertion : In the circuit shown in figure, current in wire ab will become zero as soon as switch is opened. Reason : A resistance does not oppose increase or decrease of current through it.

HC VERMA-ELECTROMAGNETIC INDUCTION-Exercises
  1. Suppose the 19 Omega resistor of the previous problem is disconnected....

    Text Solution

    |

  2. Consider the situation shown in . The wire PQ has a negligible resist...

    Text Solution

    |

  3. The current generator I g, shown in . Sends a constant current I throu...

    Text Solution

    |

  4. The current generator ig, shown in , sends a constant current I throu...

    Text Solution

    |

  5. The system containing the rails and the wire of the previous problem i...

    Text Solution

    |

  6. The rectangualr wire- frame, shown in has a width d, mass m, resist...

    Text Solution

    |

  7. Shows a smooth pair of thick metallic rails connected across a battery...

    Text Solution

    |

  8. A conducting wire ab of length l, resistance r and mass m starts slidi...

    Text Solution

    |

  9. A bicycle is resting on its stand in the east - west direction and the...

    Text Solution

    |

  10. A conducting disc of radius r rotates with a small but constant angu...

    Text Solution

    |

  11. shows a conducting disc rotating about its axis in a perpendicular ma...

    Text Solution

    |

  12. The magnetic field inn a region is given by vec B = veck (B0)/(L) y wh...

    Text Solution

    |

  13. shows a straight, long wire carrying a current I and a rod of length l...

    Text Solution

    |

  14. Consider a situation similar ot that of the previous problem except th...

    Text Solution

    |

  15. Shows a square frame of wire having a total resistance r placed coplan...

    Text Solution

    |

  16. A rectangular metallic loop of length l and width b is placed coplan...

    Text Solution

    |

  17. Shows a conducting circular loop of radius a placed in a uniform, perp...

    Text Solution

    |

  18. Consider the situation shown in the figure o fthe previous problem. Su...

    Text Solution

    |

  19. Consider a variation of the previous problem. Suppose the circular loo...

    Text Solution

    |

  20. Shows a situation similar to the previous problem. All parameters are...

    Text Solution

    |