Home
Class 12
PHYSICS
Two parallel very long straight wires ca...

Two parallel very long straight wires carrying current of 5A each are kept at a separation of 1 m. If the currents are in the same direction, the force per unit length between them is ______ N/m. `(mu_(0)=4pixx10^(-7)SI)`

A

`5xx10^(-5)`, attractive

B

`5xx10^(-6)`, attractive

C

`5xx10^(-5)`, repulsive

D

`5xx10^(-6)`, repulsive

Text Solution

Verified by Experts

The correct Answer is:
B
`F=mu_(0)/(2pi)xx(I_(1)I_(1))/y`
= `2xx10^(-7)xx(5xx5)/1`
= `5xx10^(-6)N/m`, attractive
Promotional Banner

Topper's Solved these Questions

  • MOVING CHARGES AND MAGNETISM

    KUMAR PRAKASHAN|Exercise SECTION D (MULTIPLE CHOICE QUESTIONS)|108 Videos

  • MAGNETISM AND MATTER

    KUMAR PRAKASHAN|Exercise SECTION D Multiple Choice Questions (MCQs) (MCQs asked in Competitive Exams) MCQs asked in Board Exam and GUJCET|7 Videos

  • RAY OPTICS AND OPTICAL INSTRUMENTS

    KUMAR PRAKASHAN|Exercise SECTION-D (MULTIPLE CHOICE QUESTIONS (MCQs))(MCQs ASKED IN COMPETITIVE EXAMS)|142 Videos

Similar Questions

Explore conceptually related problems

Two long and parallel straight wires A and B carrying currents of 8.0 A and 5.0 A in the same direction are separated by a distance of 4.0 cm. Estimate the force on a 10 cm section of wire A.

Two long and parallel straight wires A and B carrying currents of 10.0 A and 4.0 A in the same direction are separated by a distance of 4.0 cm. Estimate the force on a 10 cm section of wire A.

A long straight wire in the horizontal plane carries a current of 50 A in north to south direction. Give the magnitude and direction of B at a point 2.5 m east of the wire

When current passing through two parallel wires force on them ______ while opposite current passes through same wire force between them ______.

A uniform magnetic field of 1.5 T exists in a cylindrical region of radius10.0 cm, its direction parallel to the axis along east to west. A wire carrying current of 7.0 A in the north to south direction passes through this region. What is the magnitude and direction of the force on the wire if, (a) the wire intersects the axis, (b) the wire is turned from N-S to northeast-northwest direction, (c) the wire in the N-S direction is lowered from the axis by a distance of 6.0 cm?

Two rings X and Y are placed in such a way that their axes are along the X and the Y axes respectively and their centres are at the origin. Both the rings X and Y have the same radii of 3.14 cm. If the current through X and Y rings are 0.6 A and 0.8 A respectively, find the value of the resultant magnetic field at the origin. (mu_(0)=4pixx10^(-7)SI)

Two straight parallel wires, both carrying 10 Ampere in the same direction attract each other with a force of 1xx10^(-3)N . If both currents are doubled, what will be the force of attraction ?

KUMAR PRAKASHAN-MOVING CHARGES AND MAGNETISM-SECTION D (MCQs ASKED IN COMPETITIVE EXAMS)
  1. Ionized hydrogen atoms and alpha-particles with same momenta enters pe...

    Text Solution

    |

  2. The effective length of a magnet is 31.4 cm and its pole strength is 0...

    Text Solution

    |

  3. Equal currents are passing through two very long and straight parallel...

    Text Solution

    |

  4. A galvanometer of resistance 50Omega is connecter to a battery of 8 V ...

    Text Solution

    |

  5. Equal currents are passing through two very long and straight parallel...

    Text Solution

    |

  6. An alpha particle of mass m moves on a circular path of radius r in a ...

    Text Solution

    |

  7. A long straight wire in the horizontal plane carries a current of 50 A...

    Text Solution

    |

  8. A proton is moving perpendicular to a uniform magnetic field of 2.5 te...

    Text Solution

    |

  9. A particle of mass m and charge q is incident on xz plane with velocit...

    Text Solution

    |

  10. An electron having mass 9.1xx10^(-31)kg, charge 1.6xx10^(-19)C and mov...

    Text Solution

    |

  11. Two parallel very long straight wires carrying current of 5A each are ...

    Text Solution

    |

  12. A very long straight wire of radius r carries current I. Intensity of ...

    Text Solution

    |

  13. The dimensional formula of effective torsional constant of spring is ...

    Text Solution

    |

  14. There are 50 turns per cm length in a very long solenoid. It carries a...

    Text Solution

    |

  15. The gyromagnetic of an electron = specific charge of an electron.

    Text Solution

    |

  16. A straight wire of mass 200g and length 1.5m carries a current of 2A. ...

    Text Solution

    |

  17. Unit of Bohr magneton is …..

    Text Solution

    |

  18. Current sensivity of galvanometer in inversely proportional to……

    Text Solution

    |

  19. Frequency of cyclotron is independent of …….

    Text Solution

    |

  20. A circular coil of a wire containing 100 turns each of radius 2cm carr...

    Text Solution

    |