Physics - Wave on String Question with Solution | TestHub

$Q$ lags by $\pi /2$ and $R$ leads by $\pi /2$

$Q$ leads by $\pi /2$ and $R$ lags by $\pi /2$

$Q$ leads by $\pi$ and $R$ lags by $\pi$

$Q$ lags by $\pi$ and $R$ leads by $\pi$