7. Electric potential at a point P. r distance away due to a point charge located at a point A is V. If twice of this charge is distributed uniformly on the surface of a hollow sphere of radius 4r with centre at point A, the potential at P now is given as: A) V V/2 C) VA D) V/8 E) 0
7. Electric potential at a point P. r distance away due to a point charge located at a point A is V. If twice of this charge is distributed uniformly on the surface of a hollow sphere of radius 4r with centre at point A, the potential at P now is given as: A) V V/2 C) VA D) V/8 E) 0
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Transcribed Image Text:7. Electric potential at a point P. r distance away due to a point charge located at a point A is V. If
twice of this charge is distributed uniformly on the surface of a hollow sphere of radius 4r with
centre at point A, the potential at P now is given as:
A) V
C) VA
2V/2
D) V/8
E) 0
8. A conducting potential shell having inner radius a and outer radius b carries a net charge Q. If a
point charge q is placed at the centre of this shell, then the surface charge density on the outer
surface of the shell is given as:
A)
B)
D) zero
4mb²
4tb²
E)
4mb²
9. Ten electrons are equally spaced and fixed around a circle of radius R. Relative to V=0 at
infinity, the electrostatic potential and the electric field E at the center Care
(A) V = 0 and E = 0, (B) V = 0 and E = 0, (V = 0 and E = 0, (D) V = 0 and E ± 0, (E)
none of the options.
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