1.

The equation of S.H.M. is \[y=a\sin (2\pi nt+\alpha )\], then its phase at time t is    [DPMT 2001]

A. \[2\pi nt\] 
B. \[\alpha \]
C. \[dQ=(dU+dV)\,P\]
D. \[2\pi t\]
Answer» D. \[2\pi t\]


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