NEET-XII-Physics
01: Electric Charges And Fields
- #22-aFind the charge on the sphere. (b) What is the total electric flux leaving the surface of the sphere?Ans : Diameter of the sphere, d = 2.4 m
Radius of the sphere, r = 1.2 m
Surface charge density,
= 80.0 μC/m2 = 80 × 10-6 C/m2
Total charge on the surface of the sphere,
Q = Charge density × Surface area
=
= 80 × 10-6 × 4 × 3.14 × (1.2)2
= 1.447 × 10-3 C
Therefore, the charge on the sphere is 1.447 × 10-3 C.
(b) Total electric flux (
) leaving out the surface of a sphere containing net charge Q is given by the relation,
Where,
`` \epsilon``0 = Permittivity of free space
= 8.854 × 10-12 N-1C2 m-2
Q = 1.447 × 10-3 C
= 1.63 × 108 N C-1 m2
Therefore, the total electric flux leaving the surface of the sphere is 1.63 × 108 N C-1 m2.
- #22-bWhat is the total electric flux leaving the surface of the sphere?Ans : Total electric flux () leaving out the surface of a sphere containing net charge Q is given by the relation,
Where,
`` \epsilon``0 = Permittivity of free space
= 8.854 × 10-12 N-1C2 m-2
Q = 1.447 × 10-3 C
= 1.63 × 108 N C-1 m2
Therefore, the total electric flux leaving the surface of the sphere is 1.63 × 108 N C-1 m2.