Use the Following Figure to Answer the Next Problem $\pi\varepsilon$ ₀)^-1?
A)kQ/r²
B)2kQ/r²
C)kQ/a²
D)kQ/b²
E)zero

question 23

Multiple Choice

Use the following figure to answer the next problem:
-A solid sphere of radius a is concentric with a hollow sphere of radius b,where b > a.If the solid sphere has a charge +Q and the hollow sphere a charge of -Q,the electric field at radius r,where r > b,is which of the following,in terms of k = (4 $\pi\varepsilon$ ₀) ^-1?

• A)kQ/r²
• B)2kQ/r²
• C)kQ/a²
• D)kQ/b²
• E)zero

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