$(a)$ Potential energy is always equal to its $K.E.$
$(b)$ Average potential and kinetic energy over any given time interval are always equal.
$(c)$ Sum of the kinetic and potential energy at any point of time is constant.
$(d)$ Average $K.E.$ in one time period is equal to average potential energy in one time period.
Choose the most appropriate option from the options given below:
(for $1$ time period)
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| $List-I$ | $List-II$ |
| ($P$) If $n=2$ and $\alpha=180^{\circ}$, then all the possible values of $\theta_0$ will be | ($1$) $30^{\circ}$ and $0^{\circ}$ |
| ($Q$) If $n=\sqrt{3}$ and $\alpha=180^{\circ}$, then all the possible values of $\theta_0$ will be | ($2$) $60^{\circ}$ and $0^{\circ}$ |
| ($R$) If $n=\sqrt{3}$ and $\alpha=180^{\circ}$, then all the possible values of $\phi_0$ will be | ($3$) $45^{\circ}$ and $0^{\circ}$ |
| ($S$) If $n=\sqrt{2}$ and $\theta_0=45^{\circ}$, then all the possible values of $\alpha$ will be | ($4$) $150^{\circ}$ |
| ($5$) $0^{\circ}$ |
