Home
Class 12
PHYSICS
A straight , long wire carries a current...

A straight , long wire carries a current a current of 20A. Another wire carrying equal current is placed parallel to it. If the force acting on a length of 10cm of the second wire is `(2.0 xx (10^-5)) N`, what is the separation between them?

Text Solution

Verified by Experts

Let separation between two wires is d. then `dF = (mu_oi_1i_2)/(2pid) dl`
`rArr 2.0xx10^(-5) = (2xx10^(-7)xx20xx20/(d)`
`rArr d = 40 cm.`
Promotional Banner

Topper's Solved these Questions

  • MAGNETIC FIELD DUE TO CURRENT

    HC VERMA|Exercise Objective 2|7 Videos

  • MAGNETIC FIELD

    HC VERMA|Exercise Exercises|60 Videos

  • MAGNETIC PROPERTIES OF MATTER

    HC VERMA|Exercise Exercise|9 Videos

Similar Questions

Explore conceptually related problems

The field due to a long straight wire carrying a current I is proportional to …..

A circular loop of radius r carries a current i. where should a long , straight wire carrying a current 4i be placed in the plane of the circle so that the magnetic field at the centre becomes zero?

A long, straight wire carries a current along the z-axis. One can find two points in the x-y plane such that

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 ?

A wire carries an alternating current i=i_0sinomegat . In there an electric field in the vicinity of the wire?

A straight wire carrying current I is made into a circular loop . If M is the magnetic moment associated with the loop , then length of the wire is

A conductor of length 50 cm carrying a current of 5A is placed perpendicular to a magnetic field of induction 2xx10^(-3) T. Find the force on the conductor.

shows a straight, long wire carrying a current I and a rod of length l coplanar with the wire and perpendicular to it. The rod moves with a constant velocity v in a direction parallel to the wire. The distance of the wire from the centre of the rod is x. Find the motional emf induced in the rod.

Two parallel wires carry currents of 20A and 40A in opposite directions. Another wire carrying a current antiparallel to 20A is placed midway between the two wires. The magnetic force on it will be

Calculate the force per unit length on a long straight wire carrying current of 4A due to a parallel wire carrying 6 A current if the distance between the wire is 3cm .

HC VERMA-MAGNETIC FIELD DUE TO CURRENT-exercise
  1. A regular polygon of n sides is formed by bending a wire of total leng...

    Text Solution

    |

  2. Each of the batteries shown in figure has an emf equal to 5 V. Show th...

    Text Solution

    |

  3. A straight , long wire carries a current a current of 20A. Another wir...

    Text Solution

    |

  4. Three coplanar parallel wires, each carrying a current of 10 A along t...

    Text Solution

    |

  5. Two parallel wires separated by a distance of 10cm carry currents of 1...

    Text Solution

    |

  6. Figure shows a part of an electric circuit. The wires AB, CD, and EF a...

    Text Solution

    |

  7. A long, straight wire is fixed horizontally and carries a current of 5...

    Text Solution

    |

  8. A square loop PQRS carrying a current of 6.0 A is placed near a long w...

    Text Solution

    |

  9. A circular loop of one turn carries a current of 5.00 A. If the magnet...

    Text Solution

    |

  10. A current - carrying circular coil of 100 turns and radius 5.0 cm pro...

    Text Solution

    |

  11. An electron makes (3 xx 10^5) revolutions per second in a circle of ra...

    Text Solution

    |

  12. A conducting circular loop of radius a is connected to two long, strai...

    Text Solution

    |

  13. Two circular coils of radii 5.0 cm and 10 cm carry equal currents of 2...

    Text Solution

    |

  14. Two circular coils of radii 5.0 cm and 10 cm carry equal currents of 2...

    Text Solution

    |

  15. A circular loop of radius 20 cm carries a current of 10 A. An electron...

    Text Solution

    |

  16. A circular loop of radius R carries a current I. Another circular loop...

    Text Solution

    |

  17. A circular loop of radius r carrying a current i is held at the centre...

    Text Solution

    |

  18. Find the magnetic field B due to a semicircular wire of radius 10.0 cm...

    Text Solution

    |

  19. A piece of wire carrying a current of 6.00 A is bent in the form of a ...

    Text Solution

    |

  20. A circular loop of radius r carries a current i. where should a long ...

    Text Solution

    |