Home
Class 12
PHYSICS
A circular loop of radius 0.0157m carrie...

A circular loop of radius `0.0157m` carries a current of 2.0 amp. The magnetic field at the centre of the loop is
`(mu_(0)=4pixx10^(-7)"weber"//amp-m)`

A

`1.57xx10^(-5) weber//m^(2)`

B

`8.0xx10^(-5)weber//m^(2)`

C

`2.0xx10^(-5)weber//m^(2)`

D

`3.14xx10^(-5) weber//m^(2)`

Text Solution

Verified by Experts

The correct Answer is:
B
a=0.0157m,I=2A
` B=(mu_(0)I)/(2a)=(4pixx10^(-7)xx2)/(2xx0.0157)`
`8xx10^(-5)Wb//m^(2)`
Promotional Banner

Topper's Solved these Questions

  • MAGNETIC EFFECT OF ELECTRIC CURRENT

    NIKITA PUBLICATION|Exercise MCQs (Sensitivity and accuracy of M.C.G.)|1 Videos

  • MCQS FROM BOARD EXAM

    NIKITA PUBLICATION|Exercise COMMUNICATION SYSTEMS|7 Videos

Similar Questions

Explore conceptually related problems

A long solenoid has 200 turns per cm and carries a current of 2.5 amps. The magnetic field at its centre is (mu_(0)=4pixx10^(-7)"weber"//amp-m)

A circular loop of radius 9.7 cm carries a current 2.3 A. Obtain the magnitude of the magnetic field at the centre of the loop .

A square loop of side a carris a current I . The magnetic field at the centre of the loop is

A square loop of edge 'a' carries a current l. The magnetic field at the centre of loop is

A circular loop of diameter 80 cm carries a steady current 2 A. The magnetic field intensity at the centre of the loop is _________ xx10^(-6) T . (Permeability of vacuum mu_(0)=4pixx10^(-7) N//A^(2) , Take pi=3.14 )

A circular loop of 2 turns carries a current of 5*0A . If the magnetic field at the centre of loop is 0*40mT , find the radius of the loop.

NIKITA PUBLICATION-MAGNETISM -MCQs
  1. Two short bar moment each 200 A-m^(2) are placed as shown in the figur...

    Text Solution

    |

  2. Two short bar magnets of moment each 100 A-m^(2)are placed as shown i...

    Text Solution

    |

  3. A circular loop of radius 0.0157m carries a current of 2.0 amp. The ma...

    Text Solution

    |

  4. Current carrying circular loop acts as

    Text Solution

    |

  5. The product of nuber of turns,area of coil and current is

    Text Solution

    |

  6. Magnetism in substances is caused by

    Text Solution

    |

  7. The product of number of turns and current of loop is

    Text Solution

    |

  8. The product of ampere turn and area of coil is

    Text Solution

    |

  9. In a hydrogen atom the electrons revolves round the nucleus 6.8xx10^(1...

    Text Solution

    |

  10. Magnetic moment of coil independent of

    Text Solution

    |

  11. The electron in the hydrogen atom is moving with a speed at 2.3xx10^(6...

    Text Solution

    |

  12. A closely wound solenoid of 1000 turns and area of cross-section 2xx10...

    Text Solution

    |

  13. A circular coil of 300 turns and diameter 14cm carries a current of 15...

    Text Solution

    |

  14. In a hydrogen atom,an electron revolves with a frequency of 6.8xx10^(9...

    Text Solution

    |

  15. A circular coil of radius 4 cm having 20 turns carries a current of 3A...

    Text Solution

    |

  16. A current of 2 ampere is passed in a coil of radius 0.5 m and number o...

    Text Solution

    |

  17. The areas of cross-section of three magnets of same length are A,2AA a...

    Text Solution

    |

  18. Maghnetic dipole moment of revolving electron is

    Text Solution

    |

  19. The ratio of magnetic dipole moment to angular momentum of electron is

    Text Solution

    |

  20. The gyromagnetic ratio of electron is

    Text Solution

    |