Home
Class 12
PHYSICS
A current i flows in a circular coil of ...

A current i flows in a circular coil of radius `r`. If the coil is placed in a uniform magnetic field `B` with its plane parallel to the field, magnitude of the torque that acts on the coil is

A

Zero

B

`2pi r i B`

C

`pi r^(2) i B`

D

`2 pi r^(2) B`

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • KINETIC THEORY OF GASES

    ERRORLESS |Exercise QUESTIONS|126 Videos
  • MAGNETISM

    ERRORLESS |Exercise Assertion & Reason|1 Videos

Similar Questions

Explore conceptually related problems

When a current carrying coil is placed in a uniform magnetic field with its magnetic moment anti-parallel to the field.

A coil carrying electric current is placed in uniform magnetic field

A rectangular coil of area vecA and number of turns n is placed in a uniform magnetic field vecB. If the coil carries a current I, then the torque acting on the coil is given by

A conducting circular loop of radius r carries a constant current i. It is placed in a uniform magnetic field B such that B is parallel to the plane of the loop. The magnetic torque acting on the loop is-

A constant current I is flowing through a circular coil placed in uniform magnetic field vecB as shown. Then:

A rectangular coil 20cmxx20cm has 100 turns and carries a current of 1 A . It is placed in a uniform magnetic field B=0.5 T with the direction of magnetic field parallel to the plane of the coil. The magnitude of the torque required to hold this coil in this position is

Current I is flowing through a circular coil of radius r. It is placed in a magnetic field B0 in such a way that the plane of the circular coil is perpendicular to B0. The force acting in it will be -

A current of 5A flows through a circular coil of 200 turns, each of radius 20 cm. It is placed in a uniform magnetic induction of 5xx10^(-2)" Wb/m"^(2) , such that the plane of the coil is parallel to the field. What is the torque acting on the coil?

ERRORLESS -MAGNETIC EFFECT OF CURRENT-Exercise
  1. What is the shape of magnet in moving coil galvanometer to make the ra...

    Text Solution

    |

  2. If a wire of length l meter placed in uniform magnetic field 1.5 Tesla...

    Text Solution

    |

  3. A current i flows in a circular coil of radius r. If the coil is place...

    Text Solution

    |

  4. An arbitrary shaped closed coil is made of a wire of length L and a cu...

    Text Solution

    |

  5. A circular coil having N turns is made from a wire of length L meter. ...

    Text Solution

    |

  6. A small cylindrical soft iron piece is kept in a galvanometer so that

    Text Solution

    |

  7. A, B and C are parallel conductors of equal length carrying currents I...

    Text Solution

    |

  8. A straight conductor carries a current of 5A. An electron travelling w...

    Text Solution

    |

  9. Two galvanometers A and B require 3mA and 5mA respectively to produce ...

    Text Solution

    |

  10. Two long straight parallel conductors separated by a distance of 0.5m ...

    Text Solution

    |

  11. IF the current is doubled, the deflection is also doubled in

    Text Solution

    |

  12. Which is a vector quantity

    Text Solution

    |

  13. Three long straight wires A, B and C are carrying current as shown in ...

    Text Solution

    |

  14. Two long conductors, separated by a distance d carry current I(1) and ...

    Text Solution

    |

  15. The magnetic moment of atomic neon is

    Text Solution

    |

  16. A 1m long conducting wire is lying at right angles to the magnetic fie...

    Text Solution

    |

  17. A beam of electrons and protons move parallel to each other in the sam...

    Text Solution

    |

  18. Two parallel wires of length 9 m each are separated by a distance 0.15...

    Text Solution

    |

  19. Current i is carried in a wire of length L. If the wire is turned into...

    Text Solution

    |

  20. In ballistic galvanometer, the frame on which the coil is wound is non...

    Text Solution

    |