Author Question: A long straight metal rod has a radius of 2.0 mm and a surface charge of density 0.40 nC/m2 . ... (Read 50 times)

Alygatorr01285 · **on:** Jul 28, 2018

A long straight metal rod has a radius of 2.0 mm and a surface charge of density 0.40 nC/m2 . Determine the magnitude of the electric field 3.0 mm from the axis.
a. 18 N/C
b. 23 N/C
c. 30 N/C
d. 15 N/C
e. 60 N/C

Question 2

The axis of a long hollow metallic cylinder (inner radius = 1.0 cm, outer radius = 2.0 cm) coincides with a long wire. The wire has a linear charge density of -8.0 pC/m, and the cylinder has a net charge per unit length of -4.0 pC/m. Determine the magnitude of the electric field 3.0 cm from the axis.
a. 5.4 N/C
b. 7.2 N/C
c. 4.3 N/C
d. 3.6 N/C
e. 2.4 N/C