Home
Class 12
PHYSICS
A north pole of strengt pi A m, is moved...

A north pole of strengt` pi A m`, is moved around a circle of radius `10cm` which lies around a long straight conductor carrying a current of `10A`. The work doen is nearly

A

`4mu J`

B

`40 mu J`

C

`400 mu J`

D

`0.4 mu J`

Text Solution

Verified by Experts

The correct Answer is:
B
`w = mu_0 mn i`
Promotional Banner

Topper's Solved these Questions

  • MOVING CHARGES AND MAGNETISM

    NARAYNA|Exercise EXERCISE - 1(C.W) (TANGENT GALVANOMETER)|4 Videos

  • MOVING CHARGES AND MAGNETISM

    NARAYNA|Exercise EXERCISE - 1(C.W) (CURRENT LOOP AND MAGNETIC DIPOLE)|2 Videos

  • MOVING CHARGES AND MAGNETISM

    NARAYNA|Exercise C.U.Q (CONVERSION OF MCG INTO VOLTMETER)|9 Videos

  • MAGNETISM AND MATTER

    NARAYNA|Exercise EXERCISE - 4 (SINGLE ANSWER TYPE QUESTION)|17 Videos

  • NUCLEAR PHYSICS

    NARAYNA|Exercise LEVEL-II-(H.W)|9 Videos

Similar Questions

Explore conceptually related problems

The magnitude of magnetic induction at a distance 4 cm due to straight conductor carrying a current of 10 A is

The strength of the magnetic field around a long straight current carrying conductor :

Calculate the magnetic field at a distance of 5 cm from an infinite straight conductor carrying a current of 10 A.

The direction of the magnetic field around a straight conductor carrying current is given by ……………… .

NARAYNA-MOVING CHARGES AND MAGNETISM-EXERCISE - 1(C.W) (AMPERE.S CIRCUITAL LAW BIOT-SAVART LAW AND ITS APPLICATIONS)
  1. A north pole of strengt pi A m, is moved around a circle of radius 10c...

    Text Solution

    |

  2. A closed circuit is in the form of a regular hexagon of side r. If the...

    Text Solution

    |

  3. A current of 1//(4pi) ampere is flowing in a long straight conductor. ...

    Text Solution

    |

  4. A wire in the form of a square of side '2m' carries a current 2A. Then...

    Text Solution

    |

  5. An electric current passes through a long straight wire. At a distanc...

    Text Solution

    |

  6. A current of one ampere is passed through a straight wire of length 2*...

    Text Solution

    |

  7. A straight vertical conductor carries a current. At a point 5cm due no...

    Text Solution

    |

  8. A circular coil of radius 25cm, carries a current of 50 ampere. If it ...

    Text Solution

    |

  9. A circular coil of radius R carries a current i. The magnetic field at...

    Text Solution

    |

  10. Two circular coils are made of two identical wires of same length and ...

    Text Solution

    |

  11. Two circular coils have diameters 10cm and 20cm with same number of tu...

    Text Solution

    |

  12. A wire carrying a current of 4A is in the form of the circle. It is ne...

    Text Solution

    |

  13. Two concentric circular coils A and B have radii 25cm and 15cm and ca...

    Text Solution

    |

  14. A wire carrying a current of 140 ampere is bent into the form of a cir...

    Text Solution

    |

  15. The magnetic induction at a point at a large distance d on the axial l...

    Text Solution

    |

  16. A particle having charge 100 times that of an electron is revolving in...

    Text Solution

    |

  17. A battery is connected between two points A and B on the circumference...

    Text Solution

    |