Home
Class 12
PHYSICS
A magnetised wire of moment M is bent in...

A magnetised wire of moment M is bent into an arc of a circle subtending an angle of 60^(@) at the centre. The new magnetic moment is

A

`3M//pi `

B

`M//pi`

C

`2M//pi`

D

`3sqrt(3)M// pi`

Text Solution

Verified by Experts

The correct Answer is:
A
New magnetic moment .
`M = M xx (2 sin (theta //2))/(theta) = M xx (2xx (1//2))/(pi//3) = (3M)/(pi)`
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • MAGNETISM AND MATTER

    FIITJEE|Exercise SOLVED PROBLEMS OBJECTIVE : (LEVEL - II)|10 Videos

  • MAGNETISM AND MATTER

    FIITJEE|Exercise EXERICSE|4 Videos

  • MAGNETISM AND MATTER

    FIITJEE|Exercise SOLVED PROBLEMS|9 Videos

  • MAGNETISM

    FIITJEE|Exercise Example|12 Videos

  • MODERN PHYSICS

    FIITJEE|Exercise Numerical based questions|5 Videos

Similar Questions

Explore conceptually related problems

A magnetized wire of magnetic moment M is bent into an are of a circle that subtends an angle of 30° at the centre. The equivalent magnetic moment is found to be Q times M. The numerical value of M should be _____

A piece of wire 20 cm long is bent into the from of an arc of a circle, subtending an angle of 60^(@) at its centre. Find the radius of the circle.

Knowledge Check

  • A magnetised wire is bent into an arc of a circle subtending an angle 60^(@) at its centre. Then its magnetic moment is X. If the same wire is bent into an are of a circle subtending an angle 90^(@) at its centre then its magnetic moment will be

    A
    `(xsqrt2)/3`
    B
    `x/3`
    C
    `((2sqrt2)x)/3`
    D
    `(3x)/(2sqrt2)`

  • A magnetised wire is bent into an arc of a circle subtending an angle 90^(0) at its centre then its manetic moment will be

    A
    `(xsqrt2)/(3)`
    B
    `(x)/(3)`
    C
    `((2sqrt2)x)/(3)`
    D
    `(3x)/(2sqrt2)`

  • If the piece of wire 25 cm long is bent into an arc of a circle subtending an angle of 75^(@) at the centre , then the radius of the circle ( in cm ) is :

    A
    `(pi)/(120)`
    B
    `(60)/(pi)`
    C
    `60 pi `
    D
    none of these

    • Similar Questions

    Explore conceptually related problems

    A piece of wire 22 cm long is bent into the form of an arc of a circle subtending an angle of 60^(@) at its centre. Find the radius of the circle. ["Use" pi = (22)/(7)]

    A piece of wire 11 cm long is bent into the form of an arc of a circle subtending an angle of 45^(@) at its centre. Find the radius of the circle.

    A bar magnet of moment M is bent into arc, its moment

    If a piece of wire 25 cm long is bent into an arc of a circle subtending an angle of 75 at the center, then the radius of the circle (in cm) is :

    A wire of length 10cm is bent into an arc of a circle such that it subtends an angle of 1 radian at the centre. If a current of 1A is passed through the wire, the magnetic induction at the centre of the circle will be

    Home
    Profile