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A ring of radius 'r' and mass per unit l...

A ring of radius 'r' and mass per unit length 'm' rotates with an angular velocity `'omega'` in free space then :

A

zero

B

`(1)/(2)momega^(2)r^(2)`

C

`momega^(2)r^(2)`

D

`mromega^(2)`

Text Solution

Verified by Experts

The correct Answer is:
C
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Knowledge Check

  • A conducting ring of radius R has charge Q distributed unevenly over it. If it rotates with an angular velocity omega , the equivalent current will be

    A
    zero
    B
    `Qomega`
    C
    `Q (omega)/(2pi)`
    D
    `Q (omega)/(2piR)`

  • A ring of radius R is first rotated with an angular velocity omega and then carefully placed on a rough horizontal surface. The coefficient of friction between the surface and the ring is mu . Time after which its angular speed is reduced to half is

    A
    `(omega_(0)muR)/(2g)`
    B
    `(omega_(0)g)/(2muR)`
    C
    `(2omega_(0)R)/(mug)`
    D
    `(omega_(0)R)/(2mug)`

  • There is a ring of radius r having linear charge density lambda and rotating with a uniform angular velocity omega. the magnetic field produced by this ring at its own centre would be

    A
    `(lambda omega^(2))/(2-mu_(0))`
    B
    `(mu_(0)lambda^(2)omega)/(sqrt2)`
    C
    `(mu_(0)lambda omega)/(2)`
    D
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