metal sphere with radius $1\mathrm{.}40$ cmcm is supported on an insulating stand at the center of a hollow, metal, spherical shell with radius rbrb $=9\mathrm{.}90$ cmcm$.$ Charge $+$q$+$q is put on the inner sphere and charge $$q$$q on the outer spherical shell. The magnitude of qq is chosen to make the potential difference between the spheres $450$ VV$,$ with the inner sphere at higher potential.

Part A

Calculate qq$.$

Express your answer in coulombs.

Activate to select the appropriates template from the following choices. Operate up and down arrow for selection and press enter to choose the input value typeActivate to select the appropriates symbol from the following choices. Operate up and down arrow for selection and press enter to choose the input value type

qq $=$

nothing

CC

SubmitRequest$$Answer

Part B

Are the electric field lines and equipotential surfaces mutually perpendicular?

YesNo

SubmitRequest$$Answer

Part C

Are the equipotential surfaces closer together when the magnitude of E$$E$$ is largest?

Equipotential surfaces closer together when the magnitude of E$$E$$ is largest.Equipotential surfaces closer together when the magnitude of E$$E$$ is smallest.