Discussion
A parallel plate capacitor with plates of 100 cm² and a gap of 0.5 mm filled with mica of relative permittivity 6 has a capacitance of about
Answer: B
The area is \( 10^{-2} \) m², so \( 6 \times 8.854 \times 10^{-12} \times 10^{-2}/(5 \times 10^{-4}) = 1.06 \times 10^{-9} \) F. Mica capacitors of this construction were the standard precision component before plastic films displaced them.
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