The capacitor shown consists of two concentric metallic cylindrical shells. Assuming that the radius of the inner cylinder, $$\(r\)$$, is much greater than the plate separation distance, $$\(d\)$$, what is the approximate capacitance of the capacitor?
A.
\(C=\varepsilon_{0} \pi r^{2} / d\)
B.
\(C=\varepsilon_{0} \pi r l / d\)
C.
\(C=\varepsilon_{0} \pi d l / r\)
D.
\(C=2 \varepsilon_{0} \pi r / / d\)
E.
\(C=\varepsilon_{0} d / 2 \pi r l\)
Exam No：AP Physics C(EM) Practice Test Year：2024 Question No：18
Answer:
D
Knowledge points:
2.2 Conductors, Capacitors, Dielectrics: Capacitors
Solution:
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