Home
Class 12
PHYSICS
The magnetic field at a distance r from ...

The magnetic field at a distance r from a long wire carryimg current I is 0.4 T. The magnetic field at a distance 2r is

A

0.2 tesla

B

0.8 tesla

C

0.1 tesla

D

1.6 tesla

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • MAGNETIC EFFECT OF ELECTRIC CURRENT

    TARGET PUBLICATION|Exercise EVALUATION TEST|19 Videos

  • MAGNETIC EFFECT OF ELECTRIC CURRENT

    TARGET PUBLICATION|Exercise CRITICAL THINKING|68 Videos

  • KINETIC THEORY OF GASES AND RADIATION

    TARGET PUBLICATION|Exercise Evaluation test|18 Videos

  • MAGNETISM

    TARGET PUBLICATION|Exercise EVALUATION TEST|14 Videos

Similar Questions

Explore conceptually related problems

The strength of the magnetic field at a point r near a long straight current carrying wire is B . The field at a distance r/2 will be

What is the magnetic field at a distance R from a coil of radius r carrying current l ?

Magnetic field at a distance 'a' from long current carrying wire is proportional to -

The magnetic induction at apoint P which is at the distance 4 cm from a long current carrying wire is 10^(-3) T . The field of induction at a distance 12 cm from the current will be

TARGET PUBLICATION-MAGNETIC EFFECT OF ELECTRIC CURRENT-COMPETITIVE THINKING
  1. If a long hollow copper pipe carriers a direct current, the magnetic f...

    Text Solution

    |

  2. The magnetic induction at apoint P which is at the distance 4 cm from ...

    Text Solution

    |

  3. The magnetic field at a distance r from a long wire carryimg current I...

    Text Solution

    |

  4. A long straight wire carries a current of pi amp. The magnetic field d...

    Text Solution

    |

  5. If the strength of the magnetic field produced 10cm away from a infini...

    Text Solution

    |

  6. Two identical conducting wires AOB and COD are placed at right angles ...

    Text Solution

    |

  7. A long staright wire of radius a carries a steady current I. The cure...

    Text Solution

    |

  8. A current l flows along the length of an infinitely long, straight, th...

    Text Solution

    |

  9. The magnetic field at the centre of a circular coil of radius r carryi...

    Text Solution

    |

  10. Two concentric coils of 10 turns each are placed in the same plane. Th...

    Text Solution

    |

  11. The ratio of magnetic field at the centre of a current carrying cir...

    Text Solution

    |

  12. A long wire carries a steady curent . It is bent into a circle of one ...

    Text Solution

    |

  13. A length of wire carries a steady current. It is first bent to form a ...

    Text Solution

    |

  14. When a certain length of wire is turned into one circular loop, the ma...

    Text Solution

    |

  15. Circular loop of a wire and a long straight wire carry current I(c ) a...

    Text Solution

    |

  16. There are 50 turns of a wire in every cm langth of a long solenoid. If...

    Text Solution

    |

  17. A closely wound solenoid of 2000 turns and area of cross-section 1.5 x...

    Text Solution

    |

  18. A proton is projected with a uniform velocity 'v' along the axis of a ...

    Text Solution

    |

  19. A solenoid has length 0.4m, radius 1 cm and 400 turns of wire. If a cu...

    Text Solution

    |

  20. A small cylindrical soft iron piece is kept in a galvanometer so that

    Text Solution

    |