$(A)$ decreasing the number of turns
$(B)$ increasing the magnetic field
$(C)$ decreasing the area of the coil
$(D)$ decreasing the torsional constant of the spring
Choose the most appropriate answer from the options given below.

Given that $L >>> a$ $L >>> b$ and $P$ is mid point of $AB$. Choose the incorrect option
If $\frac{x_0}{x_1}=3$, the value of $\frac{R_1}{R_2}$ is.