Home
Class 12
PHYSICS
If a coil of 40 turns and area 4.0 cm^(...

If a coil of `40` turns and area `4.0 cm^(2)` is suddenly remove from a magnetic field, it is observed that a charge of `2.0xx10^(-4)C` flows into the coil. If the resistance of the coil is `80Omega`, the magnetic flux density in `Wb//m^(2)` is

A

`0.5`

B

`1.0`

C

`1.5`

D

`2.0`

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • ELECTRO MAGNETIC INDUCTION

    ERRORLESS |Exercise OT|3 Videos
  • ELECTRO MAGNETIC INDUCTION

    ERRORLESS |Exercise Motional EMI|1 Videos
  • CURRENT ELECTRICITY

    ERRORLESS |Exercise Self Evaluation Test -19|23 Videos
  • ELECTRON, PHOTON, PHOTOELECTRIC EFFECT AND X-RAYS

    ERRORLESS |Exercise Self Evaluation Test|3 Videos

Similar Questions

Explore conceptually related problems

A coil of 1500 turns and mean area of 500 cm^2 is held perpendicular to a uniform magnetic field of induction 2 xx 10^(-4) T . The resistance of the coil is 40 ohms. When the coil is rotated through 180^@ in the magnetic field in 0.2 seconds the average electric current (in mA) induced is

a coil of 1200 turns and mean area of 500 cm^(2) is held perpendicular to a uniform magnetic field of induction 4 xx 10^(-4) T . The resistance of the coil is 20 ohms. When the coil is rotated through 180^(@) in the magnetic field in 0.1 seconds the average electric current (in mA ) induced is :

In a coil of area 10cm^(2) and 10 turns, magnetic field is directed perpendicular to the plane and is changing at a rate of 10^(4)Ts^(-1) . The resistance of the coil is 20Omega . The current in the coil will be

A coil of 10 turns and area 4xx10^(-2)m^(2) is placed in a unifrom magnetic field of flux dencity 10^(-2)T .If it is removed completely in 0.5s ,then the induced in the coil is

A coil intercepts a magnetic flux of 0.2 xx 10^(-2) Wb in 0.1 s. What is the emf induced in the coil ?

A coil of cross sectional area 100 cm^(2) is placed in the magnetic field, which changes to 4xx10^(-2)Wb//cm^(2) within 5s. What will be the current across 5Omega resistance?

A magnetic field of flux density 10 T acts normal to a cail of 50 turns having 100 cm ^(2) area. Find the emf induced, if the coil is removed from the magnetic field in 0.1 s.

A coil of 100 turns and area 5 square centimetre is placed in a magnetic field B = 0.2 T . The normal to the plane of the coil makes an angle of 60^(@) with the direction of the magnetic field. The magnetic flux linked with the coil is

ERRORLESS -ELECTRO MAGNETIC INDUCTION-SET
  1. If a coil of 40 turns and area 4.0 cm^(2) is suddenly remove from a m...

    Text Solution

    |

  2. The figure shows four wire loops, with edge length of either L or 2L. ...

    Text Solution

    |

  3. A circular coil and a bar magnet placed nearby are made to move in the...

    Text Solution

    |

  4. A square coil ABCD lying in x-y plane with its centre at origin. A lon...

    Text Solution

    |

  5. A short magnet is allowed to fall from rest along the axis of a horizo...

    Text Solution

    |

  6. The horizontal component of the earth's magnetic field at a place is 3...

    Text Solution

    |

  7. A copper disc of radius 0.1 m rotates about its centre with 10 revolut...

    Text Solution

    |

  8. A coil of Cu wire (radius r, self-inductance L) is bent in two concen...

    Text Solution

    |

  9. In which of the following circuits is the current maximum just after t...

    Text Solution

    |

  10. A small coil is introduced between the poles of an electromagnet so th...

    Text Solution

    |

  11. Two circular coils A and B are facing each other as shown in figure. T...

    Text Solution

    |

  12. A conductuing loop having a capacitor is moving outward from the magne...

    Text Solution

    |

  13. A straight wire of length L is bent into a semicircle. It is moved in ...

    Text Solution

    |

  14. If in a coil rate of change of area is (5meter^(2))/(milli second)and ...

    Text Solution

    |

  15. In series with 20 ohm resitor a 5 henry inductor is placed. To the com...

    Text Solution

    |

  16. Two circular coils P & Q are coaxially & carry currents I1 and I2 resp...

    Text Solution

    |

  17. The phase difference between the flux linkage and the induced e.m.f. i...

    Text Solution

    |

  18. A pair of parallel conducting rails lie at right angle to a uniform ma...

    Text Solution

    |

  19. The magnetic field in the cylindrical region shown in figure increase ...

    Text Solution

    |

  20. An aircraft with a wingspan of 40 m flies a speed of 1080 km hr(1) in ...

    Text Solution

    |

  21. A hundred turns of insulated copper wire are wrapped around an iron cy...

    Text Solution

    |