Questions from Modern Physics

Q: The electric field at the surface of a charged, solid,

The electric field at the surface of a charged, solid, copper sphere with radius 0.200 m is 3800 N/C, directed toward the center of the sphere. What is the potential at the center of the sphere, if we...

Q: (a). How much excess charge must be placed on a

(a). How much excess charge must be placed on a copper sphere 25.0 cm in diameter so that the potential of its center, relative to infinity, is 3.75 kV? (b). What is the potential of the sphere’s sur...

Q: Thin spherical shell with radius R1 = 3.00 cm is

Thin spherical shell with radius R1 = 3.00 cm is concentric with a larger thin spherical shell with radius R2 = 5.00 cm. Both shells are made of insulating material. The smaller shell has charge q1 =...

Q: A total electric charge of 3.50 nC is distributed uniformly

A total electric charge of 3.50 nC is distributed uniformly over the surface of a metal sphere with a radius of 24.0 cm. If the potential is zero at a point at infinity, find the value of the potentia...

Q: A parallel-plate capacitor is charged by being connected to a

A parallel-plate capacitor is charged by being connected to a battery and is kept connected to the battery. The separation between the plates is then doubled. How does the electric field change? The c...

Q: A very large plastic sheet carries a uniform charge density of -

A very large plastic sheet carries a uniform charge density of -6.00 nC/m2 on one face. (a). As you move away from the sheet along a line perpendicular to it, does the potential increase or decrease?...

Q: In a certain region of space, the electric potential is V

In a certain region of space, the electric potential is V (x, y, z) = Axy - Bx2 + Cy, where A, B, and C are positive constants. (a). Calculate the x-, y-, and z-components of the electric field. (b)...

Q: In a certain region of space, the electric potential is given

In a certain region of space, the electric potential is given by V = +Ax2y - Bxy2, where A = 5.00 V/m3 and B = 8.00 V/m3. Calculate the magnitude and direction of the electric field at the point in th...

Q: A metal sphere with radius ra = 1.20 cm is

A metal sphere with radius ra = 1.20 cm is supported on an insulating stand at the center of a hollow, metal, spherical shell with radius rb = 9.60 cm. Charge +q is put on the inner sphere and charge...

Q: A metal sphere with radius ra is supported on an insulating stand

A metal sphere with radius ra is supported on an insulating stand at the center of a hollow, metal, spherical shell with radius rb. There is charge +q on the inner sphere and charge -q on the outer sp...