An object is placed 15 cm before a convex lens with focal length 5 cm. A concave lens of focal length 10 cm is placed after the first lens with 20 cm separation between them. Make a ray diagram and confirm your answers by numberical calculation
A uniformly charged insulating sphere of radius a and net charge -2Q is placed inside the cavity of a conducting shell of an inner radius b and other radius c. If the shell has a net charge of 3Q and is concentric to the sphere, find the electr
A capacitor with C=3.1 μF is fully charged using a 6 V battery. The battery is then removed and the capacitor is connected to an uncharged capacitor with C=9.3 μF through a switch. Find the charge on each capacitor once the equilibrium is reach