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A small circular loop of area $$A$$ and resistance $$R$$ is fixed on a horizontal $$xy$$-plane with the center of the loop always on the axis $$\hat{n}$$ of a long solenoid. The solenoid has $$m$$ turns per unit length and carries current $$I$$ counterclockwise as shown in the figure. The magnetic field due to the solenoid is in $$\hat{n}$$ direction. List-I gives time dependences of $$\hat{n}$$ in terms of a constant angular frequency $$\omega$$.
List-II gives the torques experienced by the circular loop at time $$t = \frac{\pi}{6\omega}$$. Let $$\alpha = \frac{A^2 \mu_0^2 m^2 I^2 \omega}{2R}$$.
| List-I | List-II |
|---|---|
| (I) $$\frac{1}{\sqrt{2}}(\sin \omega t \, \hat{j} + \cos \omega t \, \hat{k})$$ | (P) 0 |
| (II) $$\frac{1}{\sqrt{2}}(\sin \omega t \, \hat{i} + \cos \omega t \, \hat{j})$$ | (Q) $$-\frac{\alpha}{4}\hat{i}$$ |
| (III) $$\frac{1}{\sqrt{2}}(\sin \omega t \, \hat{i} + \cos \omega t \, \hat{k})$$ | (R) $$\frac{3\alpha}{4}\hat{i}$$ |
| (IV) $$\frac{1}{\sqrt{2}}(\cos \omega t \, \hat{i} + \sin \omega t \, \hat{k})$$ | (S) $$\frac{\alpha}{4}\hat{j}$$ |
| Which one of the following options is correct? | (T) $$-\frac{3\alpha}{4}\hat{i}$$ |
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