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For a forced oscillation, match the Column I
(quantity) with Column II (expression) and select the correct answer from the codes given below.
B. The instantaneous
2. \( x(t)=A \cos \left(\omega_{d} t+\phi\right) \) acceleration of the object under forced oscillation is
C. The displacement for forced oscillation is
3. \( A=\frac{F_{0}}{\left\{m^{2}\left(\omega^{2}-\omega_{d}^{2}\right)^{2}+\omega_{d}^{2} b^{2}\right\}^{1 / 2}} \)
D. Amplitude for forced 4. \( F=F_{0} \cos \omega_{d} t \) oscillation is
\( \begin{array}{lllllllll}\text { A } & \text { B } & \text { C } & \text { D } & & \text { A } & \text { B } & \text { C } & \text { D } \\ \text { (a) } 4 & 1 & 3 & 2 & \text { (b) } & 1 & 2 & 3 & 4 \\ \text { (c) } 4 & 1 & 2 & 3 & \text { (d) } & 3 & 2 & 1 & 4\end{array} \)
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