Questions from Modern Physics

Q: A solid metal sphere with radius 0.450 m carries a

A solid metal sphere with radius 0.450 m carries a net charge of 0.250 nC. Find the magnitude of the electric field (a). at a point 0.100 m outside the surface of the sphere and (b). at a point insi...

Q: How many excess electrons must be added to an isolated spherical conductor

How many excess electrons must be added to an isolated spherical conductor 26.0 cm in diameter to produce an electric field of magnitude 1150 N/C just outside the surface?

Q: Some planetary scientists have suggested that the planet Mars has an electric

Some planetary scientists have suggested that the planet Mars has an electric field somewhat similar to that of the earth, producing a net electric flux of -3.63 × 1016 N ∙ m2/C at the planet’s surfac...

Q: A very long uniform line of charge has charge per unit length

A very long uniform line of charge has charge per unit length 4.80 µC/m and lies along the x-axis. A second long uniform line of charge has charge per unit length -2.40 µC/m and is parallel to the x-a...

Q: The electric field 0.400 m from a very long uniform

The electric field 0.400 m from a very long uniform line of charge is 840 N/C. How much charge is contained in a 2.00-cm section of the line?

Q: A hollow, conducting sphere with an outer radius of 0.

A hollow, conducting sphere with an outer radius of 0.250 m and an inner radius of 0.200 m has a uniform surface charge density of +6.37 × 10-6 C/m2. A charge of -0.500 µC is now introduced at the cen...

Q: (a) At a distance of 0.200 cm from

(a) At a distance of 0.200 cm from the center of a charged conducting sphere with radius 0.100 cm, the electric field is 480 N/C. What is the electric field 0.600 cm from the center of the sphere? (b...

Q: The electric field at a distance of 0.145 m from

The electric field at a distance of 0.145 m from the surface of a solid insulating sphere with radius 0.355 m is 1750 N/C. (a). Assuming the sphere’s charge is uniformly distributed, what is the charg...

Q: A point charge of -3.00 µC is located in

A point charge of -3.00 µC is located in the center of a spherical cavity of radius 6.50 cm that, in turn, is at the center of an insulating charged solid sphere. The charge density in the solid is

Q: An electron is released from rest at a distance of 0.

An electron is released from rest at a distance of 0.300 m from a large insulating sheet of charge that has uniform surface charge density +2.90 × 10-12 C/m2. (a). How much work is done on the electr...