तीन संधारित्र C1 = 1 μF, C2 = 2 μF तथा C3 = 3 μF, V = 10 V की आपूर्ति वोल्टता के साथ श्रेणीक्रम में जुड़े हैं। संधारित्र C2 पर विभवांतर ज्ञात कीजिए।

An electric charge 10 −3 μC is placed at the origin of the x-y plane. The potential difference between points A and B located at (√2 m, √2 m) and (2 m, 0 m) respectively is:

Two charged conducting spheres A and B, having their radii in the ratio 1 : 2, are connected to each other by a conducting wire. What will be the ratio of their surface charge densities σAσB?