Home
Class 12
PHYSICS
A current 1 ampere is passed through a s...

A current 1 ampere is passed through a straight wire of length 2.0 meters. The magnetic field at a point in air at a distance of 3 meters from either end of wire and lying on the axis of wire will be

A

`mu_0/(2pi)`

B

`mu_0/(8pi)`

C

`mu_0/(4pi)`

D

Zero

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • MODEL QUESTION PAPER -3

    SARAS PUBLICATION|Exercise EXERCISE|45 Videos

  • MODEL QUESTION PAPER 2

    SARAS PUBLICATION|Exercise EXERCISE|43 Videos

Similar Questions

Explore conceptually related problems

Two long, straight wires a and b are 2*0 m apart, perpendicular to the plane of the paper as shown in figure . The wire a carries a current of 9*6 A directed into the plane of the figure,The magnetic field at the point P at a distance of 10/11 m from the wire b is zero. Find (a) the magnitude and direction of the current in b, (b) the magnitude of the magnetic field B at the point s and (c) the force per unit length on the wire b .

A long straight wire carries a current of 35 A . What is the magnitude of the field B at a point 20 cm from the wire ?

If a current I is flowing in a straight wire parallel to X - axis and magnetic field is in Y - axis then the wire experiences

A current of 5.0 A exists in the circuit shown in The wire PQ has a length of 50 cm the magnetic field in which it is immersed has a magnitude of 0.20 T. Find the magnetic force acting on the wire PQ.

A long, straight wire carrying a current of 1.0 A is placed horizontally in a uniform magnetic field B= ( 1.0 xx 10^-5) T pointing vertically upward. Find the magnitude of the resultant magnetic field at the points P and Q, both situated at a distance of 2.0 cm from the wire in the same horizontal plane.

If a thin wire of length 88 cm is bent into a circular loop and a current of 1A is passed, a. What is the magnetic field at the centre? b. What is the magnetic field at the centre if the wire is bent into a semicircle and doubled on it? c. If the wire is looped into two loops, find the magnetic field at the centre.

A current of 10A is established in a long wire along the positive z-axis. Find the magnetic field (vec B) at the point (1m , 0 , 0).

Calculate the magnetic field at the point p (Refer figure ) due to straight wire XY carrying a current i.

Find the magnetic field at the point P in figure. The curved portion is a semicircle and the straight wires are long.

A long straight wire of radius carries a steady current I. The current is uniformly distributed over its cross - section. The ratio of the magnetic fields B and B', at a radial distances a/2 and 2a respectively, from the axis of the wire is

SARAS PUBLICATION-MODEL QUESTION PAPER 1-EXERCISE
  1. What length of the wire of specific resistance 48 xx 10^- 8Omegam in n...

    Text Solution

    |

  2. Kirchoff's II law is a consequence of conservation of

    Text Solution

    |

  3. A current 1 ampere is passed through a straight wire of length 2.0 met...

    Text Solution

    |

  4. The dimensions of magnetic field intensity H are

    Text Solution

    |

  5. A wire is situated in the eastwest direction and the current flowing t...

    Text Solution

    |

  6. A long solenoid 200 turns// cm and carries a current I. The magnetic f...

    Text Solution

    |

  7. If mu0=4pixx10^(-7)TmA^(-1) and epsilon0=8.85xx10^-2C^2N^(-1)m^(-2). T...

    Text Solution

    |

  8. ...... has the shortest wavelength

    Text Solution

    |

  9. The minimum distance between the object and its real image for concave...

    Text Solution

    |

  10. The angle of incident at which reflected light is totally polarised fo...

    Text Solution

    |

  11. A monochromatic source of light is placed at a distance d from a metal...

    Text Solution

    |

  12. The work function for the surface of aluminium is 4.2 eV. What will be...

    Text Solution

    |

  13. When a radio active isotopes "88Ra^228 decays in series by the emissio...

    Text Solution

    |

  14. A position is emitted by a radio active nucleus of at omic number 90.T...

    Text Solution

    |

  15. Complete the table

    Text Solution

    |

  16. Which one of the following has more volume. Iron block or a wooden blo...

    Text Solution

    |

  17. Tritium has a half-life of 12.5 y undergoing beta decay. What fraction...

    Text Solution

    |

  18. The dark lines in the solar spectrum are called lines.

    Text Solution

    |

  19. In an P.N.P transistor circuit, the collector current is 10 mA. If 90%...

    Text Solution

    |

  20. Focal length of an equiconvex lens is 20 cm. If we cut it once perpend...

    Text Solution

    |