(Solved):   A solid metal sphere of radius a \( =1.30 \mathrm{~cm} \) is surrounded by a concentric sp ...

 

A solid metal sphere of radius a \( =1.30 \mathrm{~cm} \) is surrounded by a concentric spherical metal shell of inner radius \( b=2.10 \mathrm{~cm} \) and outer radius \( c=2.60 \mathrm{~cm} \). The inner sphere has a net charge of \( Q_{1}=3.30 \mu \mathrm{C} \), and the outer spherical shell has a net charge of \( Q_{2}=-7.60 \mu C \) What is the radial component of the electric field \( \mathbb{E}_{r} \) at a point located at radius \( r=1.80 \mathrm{~cm} \), i.e. between the two conductors? \( \mathrm{E}_{r} \) is positive if it points outward, negative if it points inward. You are comrect. Your receipt no. is \( 151-2307 \); What is \( E_{r} \) at a point located at radius \( r=3.00 \mathrm{~cm} \), i.e. outside the outer shell? \( 4.30^{*} 10^{\wedge}-7 \mathrm{~N} / \mathrm{C} \) Use Gauss's Law, with a Gaussian surface surrounding both spheres. What is the total charge inside your Gaussian surface? (Don't forget to convert centimeters to meters.) Tries 2/10 Previaus Tries What is the surface charge density, \( \sigma_{b} \), on the inner surface of the outer spherical conductor? Tries 0/10 What is the surface charge density, \( \sigma_{c} \), an the outer surface of the outer spherical conductor?