Home
Class 12
PHYSICS
A small coil of N turns has area A and a...

A small coil of `N` turns has area `A` and a current `I` flows through it. The magnetic dipole moment of this coil will be

A

`5Am^2`

B

`15Am^2`

C

`30Am^2`

D

`45Am^2`

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • MAGNETIC EFFECT OF CURRENT AND MAGNETISM

    PRADEEP|Exercise Test Your Grip (a)|1 Videos

  • MAGNETIC EFFECT OF CURRENT AND MAGNETISM

    PRADEEP|Exercise Test Your Grip (c)|1 Videos

  • MAGNETIC EFFECT OF CURRENT AND MAGNETISM

    PRADEEP|Exercise Value Based Questions|2 Videos

  • ELECTROSTATICS

    PRADEEP|Exercise ASSERTION-REASON TYPE QUESTIONS|2 Videos

  • OPTICS

    PRADEEP|Exercise Multiple choice questions|1 Videos

Similar Questions

Explore conceptually related problems

A circular coil of wire n turns has a radius r and carries a current I . Its magnetic dipole moment is M .Now the coil is unwound and again rewound into a circular coil of half the initial radius and the same current is passed through it, then the dipole moment of this new coil is 1

A circular coil of wire "n" turns has a radius "r" and carries a current "I" . Its magnetic dipole moment is "M" .Now the coil is unwound and again rewound into a circular coil of half the initial radius and the same current is passed throught is, then the dipole moment of this new coil is

the inductance of a closed-packed coil of 400 turns is 8mH . A current of 5mA is passed through it. The magnetic flux through each turn of the coil is

A uniform conducting wire of length length 10a and resistance R is wound up into four turn as a current carrying coil in the shape of equilateral triangle of side a. If current I is flowing 4 through the coil then the magnetic moment of the coil is

The electric current in a circular coil of two turns produced a magnetic induction of 0.2 T at its centre. The coil is unwound and then rewound into a circular coil of four turns. If same current flows in the coil, the magnetic induction at the centre of the coil now is

A circular coil 'A' has a radius R and the current flowing through it is I.Another circular coil 'B' has a radius 2R and if 2I is the current flowing through it then the magnetic fields at the centre of the circular coil are in the ratio of

A circular coil 'A' has a radius R and the current flowing through it is I.Another circular coil 'B' has a radius 2R and if 21is the current flowing through it then the magnetic fields at the centre of the circular coil are in the ratio of

A circular coil 'A' has a radius R and the current flowing through it is I.Another circular coil 'B' has a radius 2R and if 21is the current flowing through it then the magnetic fields at the centre of the circular coil are in the ratio of

A circular coil of diameter 7cm has 24 turns of wire carrying current of 0.75A . The magnetic moment of the coil is

PRADEEP-MAGNETIC EFFECT OF CURRENT AND MAGNETISM-Exercise
  1. A circular coil of n turns and radius r carries a current I. The magne...

    Text Solution

    |

  2. A thin ring of radius R metre has charge q coulomb uniformly spread ...

    Text Solution

    |

  3. A small coil of N turns has area A and a current I flows through it. T...

    Text Solution

    |

  4. A circular coil carrying current behaves as a

    Text Solution

    |

  5. A long solenoid has n turns per metre and current IA is flowing throug...

    Text Solution

    |

  6. Two particles A and B having equal charges +6C, after being accelerate...

    Text Solution

    |

  7. An electron is moving at a speed of 100ms^-1 along the x-axis through ...

    Text Solution

    |

  8. The force between two parallel current carrying wires is independent o...

    Text Solution

    |

  9. A straight conductor is placed along the axis of a circular coil perpe...

    Text Solution

    |

  10. The force experienced by a wire of length 10cm kept at an angle of 30^...

    Text Solution

    |

  11. A rectangular coil of turns 500 and area 2cmxx1cm carries 100mA curren...

    Text Solution

    |

  12. To protect galvanometer from possible damages due to large current, wh...

    Text Solution

    |

  13. To convert galvanometer into ammeter which one of the following is con...

    Text Solution

    |

  14. An ammeter reads upto 1 ampere. Its internal resistance is 0.81 ohm. T...

    Text Solution

    |

  15. A galvanometer has a resistance of 30Omega and a current of 2*0mA give...

    Text Solution

    |

  16. Choose the correct statement.

    Text Solution

    |

  17. The ratio of the shunt resistance and the resistance of a galvanometer...

    Text Solution

    |

  18. When distance between two given magnetic poles is halved, force betwee...

    Text Solution

    |

  19. What is not true about poles of a magnet?

    Text Solution

    |

  20. SI unit of magnetic pole strength is

    Text Solution

    |