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

The current generator `I _g`, shown in . Sends a constant current I throught the curcuti. The wire cd is fixed and ab is made ot 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

A conducting square frame of side 'a' and a long straight wire carrying current I are located in the same plane as shown in the figure. The frame moves to the right with a constant velocity 'V'. The emf induced in the frame will be proportional to :

(a) Obtain an expression for the mutual inductance between a long straight wire and a square loop of side a as shown in figure. (b) Now assume that the straight wire carries a current of 50 A and the loop is moved to the right with a constant velocity, v = 10 m/s. Calculate the induced emf in the loop at the instant when x = 0.2 m. Take a = 0.1 m and assume that the loop has a large resistance.

A rectangular conducting loop consists of two wires on two opposite sides of length 1 joined together by rods of length d. The wires are each of the same material but with cross sections differing by a factor of 2. The thicker wire has a resistance R and the rods are of low resistance, which in turn are connected to a constant voltage source V_(0) . The loop is placed in uniform a magnetic field vecB at 45^(@) to its plane. Find the torque exerted by the magnetic field on the loop about an axis through the centres of rods.

Find the current in the sliding rod AB (resistance = R) for the arrangement shown in figure. vecB is constant and is out of the paper. Parallel wires have no resistance, v is constant. Switch S is closed at time t = 0.

Find the current in the sliding rod AB (resistance = R) for the arrangement shown in figure. vecB is constant and is out of the paper. Parallel wires have no resistance, v is constant. Switch S is closed at time t = 0.

A constant current I flows in a horizontal wire in the plane of paper from east to west as shown in the following figure : At which poit will the direction of the magnetic field be from north to south ?

A wire is bent in the form of circle of radius 2m. Resistance per unit length of wire is (1)/(pi) (Omega)/(m) . Battery of 6 V is connected between A and B angle AOB = 90^(@) . Find the current through the battery.

In a p-n junction diode, the current I can be expressed as I= I_(0) "exp" ((eV)/(2k_(B)T)-1) where I_(0) is called the reverse saturation current, V is the voltage across the diode and is positive for forward bias and negative for reverse bias, and I is the current through the diode, k_(B) is the Boltzmann constant (8.6 xx 10^(–5) eV//K) and T is the absolute temperature. If for a given diode I_(0) = 5 xx 10^(-12) A and T = 300 K, then (a) What will be the forward current at a forward voltage of 0.6 V? (b) What will be the increase in the current if the voltage across the diode is increased to 0.7 V? (c) What is the dynamic resistance? (d) What will be the current if reverse bias voltage changes from 1 V to 2 V?

A metallic ring of mass m and radius l (ring being horizontal) is falling under gravity in a region having a magnetic field. If z is the vertical direction, the z-component of magnetic field is B_Z = B_O (I + lambdaz) . If R is the resistance of the ring and if the ring falls with a velocity v, find the energy lost in the resistance. If the ring has reached a constant velocity, use the conservation of energy to determine v in terms of m, B, lambda and acceleration due to gravity g.

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 rotaes with a small but constant angul...

    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 = (B0)/(L) y overse...

    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

    |