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A circular arc of mass $m$ is connected with the help of two massless strings as shown in the figuw in vertical plane. About point $P$, small oscillations are given in the plane of the arc. Time period of the oscillations of $SHM$ will be
  • A$T = 2\pi \sqrt {\frac{{l\pi }}{{2\sqrt {2g} }}}$
  • B$T = 2\pi \sqrt {\frac{{\sqrt 2 l}}{g}}$
  • C$T = 2\pi \sqrt {\frac{{\tfrac{l}{{\sqrt 2 }}}}{g}}$
  • D$T = \sqrt 2 \pi \sqrt {\frac{l}{g}}$
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