Home
Class 12
PHYSICS
A conducting loop of face area A and res...

A conducting loop of face area A and resistance R is plaed perpendicular to a magnetic field B. The loop is withdrawn completely from the field. Find the charge which flows through any cross section of the wire in the process. Note that it is independent of the shape of the loop as well as the way it is withdrawn.

Text Solution

Verified by Experts

We know that phi= B.A. `= BA cos 0^(@) =BA`
`e=(d phi)/(dt)=(BA)/i`
`l=(e/R) =(BA)/(R)`
`phi =iT=(BA)/(R)`.
Promotional Banner

Topper's Solved these Questions

  • ELECTROMAGNETIC INDUCTION

    HC VERMA|Exercise Objective 2|10 Videos

  • ELECTRIC FIELD AND POTENTIAL

    HC VERMA|Exercise Exercises|75 Videos

  • ELECTROMAGNETIC WAVES

    HC VERMA|Exercise Exercise|9 Videos

Similar Questions

Explore conceptually related problems

A conducintg circular loop having a redius of 5.0cm, is placed perpendicular to a magnetic field of 0.50 T. It is removed from the field in 0.50 s. Find the average emf produced In the loop during this time.

A conducting circular loop of face are 2.5X10^(-3) m^2 is placed perpendicular to a magnetic field which varies as B = (0.20 T) sin[(50pi s^(-1))t] . (a)Find the chargej flowing through any cross- section during the time t=0 to t=40 ms.(b) If the resistance of the loop is 10 Omega , find the thermal energy developed in the loop in this period.

A 100 turns coil of area of cross section 200 cm^(2) having 2Omega resistance is held perpendicular to a magnetic field of 0.1 T. it its is removed from the magnetic field in one second , the induced charge produced in it is

A circular loop of radius a, carrying a current I, is placed in a tow dimensional magnetic field. The centre of the loop coincides with the centre of the filed The strenght of the magnetic field at the pariphery of the loop is B. find the magnetic force on the wire.

Shows a circular wire-loop of radius a m carrying a current I, placed in a perpendicualr matgnetic field B. (a) Consider a small part dl of the wire. Find the force on this part of the wire exerted by the magnetic field. Find the force of compression in the wire.

A conducting square loop of side l and resistance R moves in its plane with a uniform velocity v perpendicular ot one of its sides. A uniform and constant magnetic field B exists along the perpendicualr ot the plane of the loop as shown in . The current induced in the loop is

A conducting circular loop of radius r is rotated about its diameter at a constant angular velocity omega in a magnetic field B perpendicular to the axis of rotation. In what position of the loop is the induced emf zero?

A conducting circular loop is placed is a uniform magnetic field B =0.20 T with its plane perpendicular to the field . Somehow, the radius of the loop starts shrinking at a constant rate of 1.0 mm s^(-1) . Find the induced emf in the loop at an instant when the radius is 2 cm.

Shows a conducting circular loop of radius a placed in a uniform, perpendicular magnetic field B. A thick metal rod OA is pivoted at the Centre O. The other end of the rod touches the loop at A. The centre O and a fixed point C on the loop are connected by a wire OC of resistance R. A force is applied at the middle point of the rod OA perpendicularly, so that the rod rotates clockwise at a uniform angular velocity omega . Find the force.

HC VERMA-ELECTROMAGNETIC INDUCTION-EXERCISE
  1. Shows a conducting square loop placed parallel to the pole faces of a ...

    Text Solution

    |

  2. A conducting square loop having edges of length2.0 cm is rotated throu...

    Text Solution

    |

  3. A conducting loop of face area A and resistance R is plaed perpendicul...

    Text Solution

    |

  4. A long slenoid of radius 2 cm has 100 turns/cm and carries a current o...

    Text Solution

    |

  5. Shown a metallic square frame of edga a in a vertical plane. A uniform...

    Text Solution

    |

  6. The north pole of a magnet is brought down along the axis of a horizon...

    Text Solution

    |

  7. A wire loop confined in a plane is rotated in its open plane with some...

    Text Solution

    |

  8. Shown a square loop of side 5 cm beign moved towards right at a consta...

    Text Solution

    |

  9. Find the total heat produced in the loop of the previous problem durin...

    Text Solution

    |

  10. A unifrom magnetic field B exists in a cylindrical region of radius 10...

    Text Solution

    |

  11. Shows a square loop having 100 turns, an area of 2.5 X10^(-3) m^2 and...

    Text Solution

    |

  12. Shown a circular coil of N turns and radius a, connected to a battery...

    Text Solution

    |

  13. A circular coil of radius 2.00 cm has 50 turns. A uniform magnetic fie...

    Text Solution

    |

  14. A closed coil having 100 turns is rotated in a uniform magnetic field ...

    Text Solution

    |

  15. A coil of radius 10 cm and resistance 40 Omega has 1000 turns. It is ...

    Text Solution

    |

  16. A circular coil of one turn of radiius 5.0 cm is rotated about a diam...

    Text Solution

    |

  17. suppose the ends of the coil in the previous problem are connected to...

    Text Solution

    |

  18. shows a circular wheel of radius 10.0 cm whose upper half, shown dark...

    Text Solution

    |

  19. A 20 cm long conducting rod is set into pure translation with a unifor...

    Text Solution

    |

  20. A metallic metre sitck moves with a velocity of 2 ms ^(-1) in a direc...

    Text Solution

    |