Home
Class 12
PHYSICS
A current loop of arbitrary shape lies i...

A current loop of arbitrary shape lies in a uniform magnetic field B. show that the net magnetic force acting on the loop is zero.

Text Solution

Verified by Experts

F_1 = Force on AD = iLB inward ,
F_2 = Force on BC = iLB inward,
They cancel each other ,
F_3 = force on CD = iLB inward,
F_4 = Force on AB = iLB inward ,
They also cancel each other. So , the net force on the body is 0.
Promotional Banner

Topper's Solved these Questions

  • MAGNETIC FIELD

    HC VERMA|Exercise objective2|10 Videos

  • LIGHT WAVES

    HC VERMA|Exercise Exercises|41 Videos

  • MAGNETIC FIELD DUE TO CURRENT

    HC VERMA|Exercise exercise|61 Videos

Similar Questions

Explore conceptually related problems

An electric dipole is held in a uniform electric field. Straight the net force acting on it is zero.

A current loop in a magnetic field

Is it possible for a current loop to stay without rotating in a uniform magnetic field? If yes, what should be the orientation of the loop?

A square current carrying loop is suspended in a uniform magnetic field acting in the plane of the loop. If the force on one arm of the loop is vecF , the net force on the remaining three arms of the loop is :

A rectangular closed loop moves horizontally in a uniform magnetic field. i. Will there be any induced current in the loop if the loop is completely in the magnetic field? ii. Will there be any induced current in the loop if the loop is partially out of the magnetic field? iii. Will the induced current in the loop remain if the loop is stationary and the magnetic field changes with time?

A square loop PQRS carrying a current of 6.0 A is placed near a long wire carrying 10 A as shown in figure . (a) Show that the magnetic force acting on the part PQ is equal and opposite to that on the part RS. (b) Find the magnetic force on the square loop.

A conductlng circular loop is placed in a uniform magnetic field 0.04 T with its plane perpendicular to the magnetic field. The radius of the loop starts shrinking at 2 mm//s . The induced emf in the loop when the radius is 2 cm is:

A closet loop PQRS carrying a current is placed in a uniform magnetic field. If the magnetic forces on segments PS,SR and RQ are F_1,F_2 and F_3 respectively and are in the plane of the paper and along the directions shown, the force on the segment QP is: .

A circular coil ABCD carrying a current i is placed in a uniform magnetic field. If the magnetic force on the segment AB is vecF , the force on the remaining segment BCDA is:

HC VERMA-MAGNETIC FIELD-Exercises
  1. A hypthetical magnetic field existing in a region is given by vecB= B0...

    Text Solution

    |

  2. A rectangular wire-loop of width a is suspended from the insulated pa...

    Text Solution

    |

  3. A current loop of arbitrary shape lies in a uniform magnetic field B. ...

    Text Solution

    |

  4. Prove that the force acting on a current carrying wire, joining two f...

    Text Solution

    |

  5. A semicircular wire of radius 5.0 cm carries a current of 5.0 A. A ma...

    Text Solution

    |

  6. A wire, carrying a current i, is kept in the x-y plane along the curve...

    Text Solution

    |

  7. A rigid wire consists of a semicircular portion of radius R and two s...

    Text Solution

    |

  8. A straight horizontal wire of mass 10mg and length 1.0 m carries a cur...

    Text Solution

    |

  9. Two metal strips, each of length, each of length l, are clamped paral...

    Text Solution

    |

  10. A matel wire PQ of mass 10g lies at rest on two horizontal metal rails...

    Text Solution

    |

  11. A straight wire of length l can slide on two parallel plastic rails k...

    Text Solution

    |

  12. Shows a circular wire-loop of radius a m carrying a current I, placed ...

    Text Solution

    |

  13. A current of 10A is established in a long wire along the positive z-ax...

    Text Solution

    |

  14. The magnetic field existing in a region is given by vecB =B0(1+(x)/(l)...

    Text Solution

    |

  15. A conducting wire of length l, lying normal to a magnetic field B, mo...

    Text Solution

    |

  16. A currrent I is passed through a silver strip of width d and area of...

    Text Solution

    |

  17. A particle having a charge of 2.0X10^(-8) C and a mass of 2.0X10^(-10...

    Text Solution

    |

  18. A proton describes a circle of radius 1 cm in a magnetic field of stre...

    Text Solution

    |

  19. An electron having a kinetic energy of 100eV circulates in a path of r...

    Text Solution

    |

  20. Protons having kinetic energy K emerge from an accelerator as a narrow...

    Text Solution

    |