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A circular disc of which 2//3 part is co...

A circular disc of which `2//3` part is coated with yellow and `1//3` part is with blue . It is rotated about its central axis with high velocity. Then it will be seen as

A

green

B

blue

C

white

D

yellow

Text Solution

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The correct Answer is:
A
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Knowledge Check

  • A circular disc fixed at its centre to a metal wire and the other end of the wire is clamped. The disc is rotated about the wire as axis and is released. The disc about this axis makes simple harmonic oscillations with a frequency of (1)/(2) Hz. If moment of inertia of the disc about this axis is 0.1 kg -m^(2) , the torsional constant of the wire is

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