A small mass charged sphere ( q= 3 µC ) is attached by an insulating string to the surface of a very large conductor with a surface charge density of o = 76.3 HC. Given that %3D the string makes an angle with the surface equal to 30 degrees, find the tension ( in N) in the string. use Eo = 8.8542x10-12 F.m-1. String

A small mass charged sphere (q= 3 µC) is attached by an insulating string to the surface of a very large conductor with a surface charge density of o = 20.9 µC. Given that the string makes an angle with the surface equal to 30 degrees, find the tension ( in N) in the string. use &o = 8.8542x10-12 F-m-1. String +. Select one: OA 14.16 OB.21.24 OC 27.98 OD 818 CE708 + + + + +

You are working as an intern for a meteorological laboratory. You are out in the field taking measurements with a device that measures electric fields. You measure the electric field in the air immediately above the Earth's surface to be 194 N/C directed downward. (Assume the radius of the Earth is 6.37 x 106 m.) (a) Determine the surface charge density (in C/m²) on the ground. C/m² (b) Imagine the surface charge density is uniform over the planet. Determine the charge (in C) of the whole surface of the Earth. C (c) Determine the Earth's electric potential (in V) due to the charge found in (b). V (d) Determine the difference in potential (in V) between the head and the feet of a person 1.50 m tall. (Ignore any charges in the atmosphere.) V

What is the magnitude of the electric field a distance of 75 cm from an infinite wire of charge with a charge density of 3.5 micro-Coulombs per square meter?