Increasing Capacitance Even More

Q. two identical conducting rods AB and CD are connected to a circular conducting ring at two diametrically opposite points B and C.the radius of the ring is equal to the length of rods AB and CD.the area of cross section, thermal conductivity of the rod and ring are equal.points A and D are maintained at temperatures of 100degreeC and 0degreeC.temperature at point C will be

Q. A solid conducting sphere of radius $a$ is surrounded by a thin uncharged concentric conducting shell of radius $2a$. A point charge $q$ is placed at a distance $4a$ from common centre of conducting sphere and shell. The inner sphere is then grounded. The charge on solid sphere is

1. $-\frac{q}{8}$
2. $-\frac{q}{16}$
3. $-\frac{q}{4}$
4. $-\frac{q}{2}$

Q. When a field is applied across a dielectric, the net field inside the dielectric will .

1. increase
2. reduce
3. remain same

Q. When a field is applied across a dielectric, the net field inside the dielectric will .

1. increase
2. reduce
3. remain same