Question

A thin cylindrical shell of radius R1=5.9cm is surrounded by a second cylindrical shell of radius R2=8.0cm, as in the figure (Figure 1). Both cylinders are 10 m long and the inner one carries a total charge Q1=−0.92μC and the outer one Q2=+1.55μC.

1. For points far from the ends of the cylinders, determine the electric field at a radial distance r from the central axis of 2.8 cm .

2. For points far from the ends of the cylinders, determine the magnitude of the electric field at a radial distance r from the central axis of 6.9 cm .

Express your answer using two significant figures.

3. Determine the direction of the electric field at a radial distance r from the central axis of 6.9 cm .

radially inward

radially outward

Answer 1