Home
Class 12
PHYSICS
A circular coil of a wire containing 100...

A circular coil of a wire containing 100 turns each of radius 2cm carries a current of 0.20A. The magnetic field at the centre of the coil is…..

A

`2pi xx 10^(-4)`

B

`pi xx 10^(-4)`

C

`3pi xx10^(-4)`

D

`10^(-4)`

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • ELECTROMAGNETIC WAVES

    KUMAR PRAKASHAN|Exercise BOARD.S QUESTION PAPER MARCH - 2020 (PART - B) SECTION - A|10 Videos

  • ELECTROMAGNETIC WAVES

    KUMAR PRAKASHAN|Exercise BOARD.S QUESTION PAPER MARCH - 2020 (PART - B) SECTION - B|8 Videos

  • ELECTROMAGNETIC WAVES

    KUMAR PRAKASHAN|Exercise SECTION D MULTIPLE CHOICE QUESTIONS (MCQs) MCQs asked in Competitive Exams|23 Videos

  • ELECTROMAGNETIC INDUCTION

    KUMAR PRAKASHAN|Exercise Section D MCQs (MCQs asked in Competitive Exams )|38 Videos

  • ELECTROSTATIC POTENTIAL AND CAPACITANCE

    KUMAR PRAKASHAN|Exercise Section D ( MCQs asked in Cometitive Exams )|39 Videos

Similar Questions

Explore conceptually related problems

A circular coil of wire consisting of 100 turns, each of radius 8.0 cm carries a current of 0.40 A. What is the magnitude of the magnetic field B at the centre of the coil?

A circular coil of wire consisting of 100 turns, each of radius 4.0 cm carries a current of 0.40 A. What is the magnitude of the magnetic field B at the centre of the coil ?

Consider a tightly wound 200 turn coil of radius 20 cm, carrying a current of 1A. What is the magnitude of the magnetic field at the centre of the coil ?

Consider a tightly wound 100 turn coil of radius 10 cm, carrying a current of 1 A. What is the magnitude of the magnetic field at the centre of the coil?

Consider a tightly wound 100 turn coil of radius 10 cm, carrying a current of 1 A. What is the magnitude of the magnetic field at the centre of the coil ?

A 100 turn closely wound circular coil of radius 10 cm carries a current of 3.2 A. (a) What is the field at the centre of the coil? (b) What is the magnetic moment of this coil? The coil is placed in a vertical plane and is free to rotate about a horizontal axis which coincides with its diameter. A uniform magnetic field of 2T in the horizontal direction exists such that initially the axis of the coil is in the direction of the field. The coil rotates through an angle of 90^@ under the influence of the magnetic field. (c) What are the magnitudes of the torques on the coil in the initial and final position? (d) What is the angular speed acquired by the coil when it has rotated by 90^@ ? The moment of inertia of the coil is 0.1 kg m^2 .

There are 50 turns per cm length in a very long solenoid. It carries a current of 2.5A. The magnetic field at its centre on the axis is ______ T.

KUMAR PRAKASHAN-ELECTROMAGNETIC WAVES-BOARD.S QUESTION PAPER MARCH - 2020 (PART - A)
  1. Current sensivity of galvanometer in inversely proportional to……

    Text Solution

    |

  2. Frequency of cyclotron is independent of …….

    Text Solution

    |

  3. A circular coil of a wire containing 100 turns each of radius 2cm carr...

    Text Solution

    |

  4. Which one of the following represent Curie's law?

    Text Solution

    |

  5. At the place, on the surface of the earth, ratio of horizontal and ver...

    Text Solution

    |

  6. Meissner effect is observed in………substances.

    Text Solution

    |

  7. Dimensional formula of mutual inductance is …….

    Text Solution

    |

  8. The magnitude of the induced emf is equal to the time rate of change o...

    Text Solution

    |

  9. Which one of the following is an equation of magnetic energy density?

    Text Solution

    |

  10. A 15 mu F capacitor is connected to a 220V, 50Hz a.c source Value of c...

    Text Solution

    |

  11. Electric quantity …………is equivalent to mechanical quantity, force cons...

    Text Solution

    |

  12. In L-C capacitor oscillator at………. Time energy in capacitor and energy...

    Text Solution

    |

  13. A power transmission line feeds input power at 3300V to a step down tr...

    Text Solution

    |

  14. Dimension of 1/(mue) is same as dimension of…….

    Text Solution

    |

  15. Frequency of FM radio band is from…….

    Text Solution

    |

  16. To destroy cancer cells……. Are used.

    Text Solution

    |

  17. In optical fiber the refractive index of the material of the core is……...

    Text Solution

    |

  18. A magician during a show makes a glass lens with n=1.47 disappear in t...

    Text Solution

    |

  19. If a size of particle is a and wavelength of light is lamda for a lt l...

    Text Solution

    |

  20. In a Young double slit experiment, the width of the source slit is inc...

    Text Solution

    |