Two thin spherical shells, one with radius R and the other with radius 2R, surround an isolated charge point particle. The ratio of the number of field lines through the larger sphere to the number through the smaller is

A spherical shell of radius R has a charge+q units. The electric field due to the shell at a pointInside is zero and varies as outside itInside the constant and varies as outside itInside is zero and varies as outside itInside is constant and varies as outside it

A spherical conductor of radius R is carrying a charge of +Q. The ratio of the electric potentialscorresponding to a point on the surface of the conductor and a point at a distance2R from thecentre of the conductor are in the ratio

The figure shows a hollow conducting spherical shell with an inner radius of 8 cm and an outer radius of 10 cm. A charge, q, placed at the center of the shell causes an electric field at the inner surface of the shell, Ei𝐸𝑖 , which has a magnitude of 80 N/C and points toward the center of the sphere. The electric field at the outer surface, Eo𝐸𝑜 , has a magnitude of 80 N/C and points away from the center of the sphere. Determine the charge of the particle, q.  rev: 10_23_2013_QC_2344Multiple Choice+ 1.46 × 10−10 C+ 1.46 × 10-10 C0 C− 5.69 × 10−11 C- 5.69 × 10-11 C− 1.46 × 10−10 C- 1.46 × 10-10 C+ 5.69 × 10−11 C+ 5.69 × 10-11 C− 3.20 × 10−11 C- 3.20 × 10-11 C+ 8.89 × 10−11 C+ 8.89 × 10-11 C+ 3.20 × 10−11 C+ 3.20 × 10-11 C− 8.89 × 10−11 C

A spherical shell of mass m and radius R having uniform mass distribution over the surface. If inside the shell gravitational field at a distance  R2   from center is a   and outside field at distance  is b, then the ratio (a+b)/b  is

Electric field lines from positive charges point radially , and point radially for negative charges.