| LIST I | LIST II | ||
| A. | Frequency is the characteristics of | I. | Due to dispersion of light |
| B. | In a soap bubble colours are seen | II. | Medium of travel of light |
| C. | Wavelength depends on | III. | Source of light |
| D. | In a prism colours appear | IV. | Due to interference of light |
\(XPQY\) is a vertical smooth long loop having a total resistance \(R\), where \(PX\) is parallel to \(QY\) and the separation between them is \(l\). A constant magnetic field \(B\) perpendicular to the plane of the loop exists in the entire space. A rod \(CD\) of length \(L\,(L>l)\) and mass \(m\) is made to slide down from rest under gravity as shown. The terminal speed acquired by the rod is _______ m/s. 
A biconvex lens is formed by using two plano-convex lenses as shown in the figure. The refractive index and radius of curvature of surfaces are also mentioned. When an object is placed on the left side of the lens at a distance of \(30\,\text{cm}\), the magnification of the image will be: 