Question

Electric field intensity
& A
9 = E.Ega
= 100 ~ 8.85 x 10-12 x 10-2
[: €0 = 8.85 x 10-12 C2/N m?]
= 8.85 × 10-12 coulomb.
Ans.
Q. 5. The radii of inner and outer spheres of a spherical condenser
are 10 cm and 12 cm respectively. If a charge of 30 nano-coulomb is
imparted to the inner sphere and there is a medium of dielectric constant
5 in between the two spheres, calculate the potential difference between
the spheres and the capacity of the condenser.
Solution : Given : q = 30 x 10-9 coulomb, a = 10 cm =
10 cm = 10 x 10-2 m,
b = 12 cm = 12 x 10-2 m and K = 5.
Potential difference between the spheres V =
9
41€,Kl ab
Y109
09 2010-9-
-
-2​

Answer 1

Answer:

Since charges tend not to move easily in nonmetallic solids it's possible to have "islands" of charge in glass, ceramics, and plastics. The latin word for island is insula, which is the origin of the word insulator. In contrast, charges in metallic solids tend to move easily — as if someone or something was leading them. The latin prefix con or com means "with". A person you have bread with is a companion. (The latin word for bread is panis.) To take something with you on the road is to convey it. (The latin word for road is via.) The person you travel with who leads the way or provides safe passage is a conductor. (The latin word for leader is ductor.) A material that provides safe passage for electric charges is a conductor.