Home
Class 12
PHYSICS
A wire bent in the form of a regular pol...

A wire bent in the form of a regular polygon of n sides, is inscribed in a circle of radius a. If I ampere is the current flowing in the wire, then the magnetic field at the centre of the circle is

A

`(mu_(0)i)/(2pia)"tan"(pi)/(n)`

B

`(mu_(0)ni)/(2pia)"tan"(pi)/(n)`

C

`(2)/(pi)(ni)/(a)mu_(0)"tan"(pi)/(n)`

D

`(ni)/(2a)mu_(0)"tan"(pi)/(n)`

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • SOURCES OF MAGNETIC FIELD

    CENGAGE PHYSICS ENGLISH|Exercise single correct Ansewer type|12 Videos

  • SOURCES OF MAGNETIC FIELD

    CENGAGE PHYSICS ENGLISH|Exercise Subjective type|10 Videos

  • RAY OPTICS

    CENGAGE PHYSICS ENGLISH|Exercise DPP 1.6|12 Videos

  • WAVE OPTICS

    CENGAGE PHYSICS ENGLISH|Exercise Comprehension Type|14 Videos

Similar Questions

Explore conceptually related problems

In the following figure a wire bent in the form of a regular polygon of n sides is inscribed in a circle of radius a . Net magnetic field at centre will be

If a square of side 10 is inscribed in a circle then radius of the circle is

A part of a long wire carrying a current i is bent into a circle of radius r as shown in figure. The net magnetic field at the centre O of the circular loop is :

A part of a long wire carrying a current i is bent into a circle of radius r as shown in figure. The net magnetic field at the centre O of the circular loop is

A wire is bent in the form of a circular arc of radius r with a straight portion AB. If the current in the wire is i , then the magnetic induction at point O is

The magnetic field at the origin due to the current flowing in the wire is

The magnetic field at the origin due to the current flowing in the wire is

A current I flows through a thin wire shaped as regular polygon of n sides which can be inscribed in a circle of radius R . The magnetic field induction at the center of polygon due to one side of the polygon is

A current I flows through a thin wire shaped as regular polygon of n sides which can be inscribed in a circle of radius R. The magnetic fidl induction at the center of polygon due to one side of the polygon is

A steady current flows in a long wire. It is bent into a circular lopp of one turn and the magnetic field at the centre of the coil is B. If the same wire is bent into a circular loop of n turns, the magnetic field at the centre of the coil is

CENGAGE PHYSICS ENGLISH-SOURCES OF MAGNETIC FIELD-single correct Answer Type
  1. Consider the following figure in which ABCD is a square of edge a .Res...

    Text Solution

    |

  2. Two thick wires and two thin wires, all of the same materais and sam...

    Text Solution

    |

  3. A wire bent in the form of a regular polygon of n sides, is inscribed ...

    Text Solution

    |

  4. A coil carrying a heavy current and having large number of turns mount...

    Text Solution

    |

  5. An electron is revolving round a proton, producing a magnetic field of...

    Text Solution

    |

  6. A thin wire of length l is carrying a constant current. The wire is be...

    Text Solution

    |

  7. A neutral point is obtained at the centre of a vertical circular coil ...

    Text Solution

    |

  8. Two concentric coplanar circular loops of radii r(1) and r(2) carry cu...

    Text Solution

    |

  9. Two similar coils are kept mutually perpendicular such that their cent...

    Text Solution

    |

  10. A current i ampere flows in a circular arc of wire whose radius is R, ...

    Text Solution

    |

  11. In the figure shown there are two semicircles of radii r(1) and r(2) i...

    Text Solution

    |

  12. Find magneitc field at O

    Text Solution

    |

  13. An infinitely long conductor is bent into a circle as shown in figure....

    Text Solution

    |

  14. A part of a long wire carrying a current i is bent into a circle of ra...

    Text Solution

    |

  15. In the figure, what is the magnetic field at the point O?

    Text Solution

    |

  16. A circular current carrying coil has a radius R. The distance from the...

    Text Solution

    |

  17. Two circular coils X and Y, having equal number of turns and carrying ...

    Text Solution

    |

  18. The field normal to the plane of a wire of n turns and radis r which c...

    Text Solution

    |

  19. A cell is connected between the point A and C of a circular conductor ...

    Text Solution

    |

  20. In the given figure net magnetic at O will be

    Text Solution

    |