Write the formula of refraction of light through a single spherical surface. The radius of curvature of one end of a cylindrical glass (n = 1.5) rod is 2 cm. Find the position and nature of the image of the point source S. See the figure and also draw the ray diagram.
What is meant by the electric potential energy of the system of point charges? Compute the total electric potential energy of the system of charges given in the figure.
Explain the principle of Wheatstone's bridge by Kirchhoff's law. In the given circuit, there is no deflection in the galvanometer \( G \). What is the current flowing through the cell?
What are the conditions for the minimum deviation by a prism? One face (AC) of a prism of refracting angle 30° and refractive index \( \sqrt{2} \), is silvered. What should be the angle of incidence \( i \) on the surface AB, so that after refraction into the prism, the reflected ray from the silvered surface retraces its path? See the figure.
Three ac circuits are shown in the figures with equal currents. Explain with reason, if the frequency of the voltage \( E \) is increased then what will be the effect on the currents in them.
In the given circuit, find out the equivalent resistances across the points A and B when:(i) \(V_A>V_B\), (ii) \(V_A<V_B\).