Home
Class 12
PHYSICS
Two parallel wire carrying equal current...

Two parallel wire carrying equal currents in opposite directions are placed at `x=+-a` parralel to y-axis with `z=0`. Magnetic field at origin O is `B_1` and at `P(2a,0,0) is B_2`. Then, the ratio `B_1//B_2` is

A

`3`

B

`1//2`

C

`1//3`

D

`2`

Text Solution

Verified by Experts

The correct Answer is:
A
(a) As shown in Fig.
`vecB_1=-2((mu_0)/(2pi) i/a)hatk=-(mu_0i)/(pia)hatk`=magnetic field at O
`vecB_2=(mu_0)/(2pi) i/ahatk-(mu_0)/(2pi) i/(3a) hatk=(mu_0)/(3pi) i/a hatk`
=magnetic field at P

`:. B_1//B_2=3`
Promotional Banner

Topper's Solved these Questions

  • SOURCES OF MAGNETIC FIELD

    CENGAGE PHYSICS|Exercise Exercise (multiple Currect )|5 Videos

  • SOURCES OF MAGNETIC FIELD

    CENGAGE PHYSICS|Exercise Exercise (assertion-reasioning )|2 Videos

  • SOURCES OF MAGNETIC FIELD

    CENGAGE PHYSICS|Exercise Exercise (subjective )|10 Videos

  • SEMICONDUCTOR ELECTRONIC : MATERIALS, DEVICES AND SIMPLE CIRCUITS

    CENGAGE PHYSICS|Exercise QUESTION BANK|12 Videos

  • THERMAL PROPERTIES OF MATTER

    CENGAGE PHYSICS|Exercise Question Bank|40 Videos

Similar Questions

Explore conceptually related problems

Two long parallel wires, AB and CD, carry equal currents in opposite directions. They lie in the x-y plane, parallel to the x-axis, and pass through the points (0,-a,0) and (0,a,0) respectively, Figure. The resultant magnetic field is:

Two parallel wires carry equal currents of 10A along the same direction and are separated by a distance of 2.0 cm. Find the magnetic field at a point which is 2.0 cm away from each of these wires.

Two long parallel wires carry currents in opposite direction as shown. Points A and D lie in the same plane as the wires. The magnetic field at A and D is into the plane of the paper, with intensity B_(A) and B_(D) respectively. If (B_(A))/(B_(D))=7/5 , the value of (I_(1))/(I_(2)) is ____________________.

Two infinite length wires carries currents 8A and 6A respectively and placed along X and Y -axis. Magnetic field at a point P(0,0,d)m will be

Two long thein, parallel conductors carrying equal current in the same direction are fixed parallel to the x-axis one passing throught magnetic field due to the two conductors at any point is B Which of the following are correct ?

Two long parallel wires carry equal current I flowing in the same direction are at a distance 2d apart. The magnetic field B at a point lying on the perpendicular line joining the wires and at a distance x from the midpoint is

Two infinite length wires carry currents 8A and 6A and are placed along X-asis and Y-axis respectively. Magnetic field at a point P(0, 0, d)m will be

In fig. two long parallel wires carry equal currents in opposite directions. Point O is situated midway between the wires and X-Y plane contains the two wires and the position Z -axis comes normally out of the plane of paper. The magnetic field B at O is non-zero along

The figure shows the cross section of two long coaxial tubes carrying equal current I in opposites directions. If B_1 and B_2 are magnetic fields at point 1 and 2 as shown in figure then

CENGAGE PHYSICS-SOURCES OF MAGNETIC FIELD-Exercise (single Correct )
  1. A steady current is flowing in a circular coil of radius R, made up o...

    Text Solution

    |

  2. The magnetic field at the centre of the circular loop as shown in Fig....

    Text Solution

    |

  3. Two parallel wire carrying equal currents in opposite directions are p...

    Text Solution

    |

  4. Figure shows three cases: in all case the circular part has radius r a...

    Text Solution

    |

  5. An otherwise infinite, straight wire has two concentric loops of radii...

    Text Solution

    |

  6. Current I1 and I2 flow in the wires shown in Fig. The field is zero at...

    Text Solution

    |

  7. For c=2a if, the magnetic field at point P will be zero when

    Text Solution

    |

  8. An infinetely long conductor PQR is bent tor form a right angle as sho...

    Text Solution

    |

  9. Two concentric coils each of radius equal to 2 pi cm are placed at rig...

    Text Solution

    |

  10. A long, straight, hollow conductor (tube) carrying a current has two s...

    Text Solution

    |

  11. A coaxial cable consists of a thin inner conductor fixed along the axi...

    Text Solution

    |

  12. A conductor AB of length L carrying a current I', is placed perpendicu...

    Text Solution

    |

  13. The magnetic field at the centre of an equilateral triangular loop of ...

    Text Solution

    |

  14. Two wires AO and OC carry equal currents i as shown in Fig. One end of...

    Text Solution

    |

  15. Equal currents i=1 A are flowing through the wires parallel to y-axis ...

    Text Solution

    |

  16. Same current i is flowing in the three infinitely long wires along pos...

    Text Solution

    |

  17. Two very long straight parallel wires carry steady currents i and 2i i...

    Text Solution

    |

  18. two infinite wires, carrying currents i1 and i2., are lying along x-an...

    Text Solution

    |

  19. A long cylinder of wire of radius 'a' carries a current i distributed ...

    Text Solution

    |

  20. Two infinite long wires, each carrying current I, are lying along x- a...

    Text Solution

    |