A Capacitor Is Made with Two Strips of Metal Foil,each $\mu$

Multiple Choice

A capacitor is made with two strips of metal foil,each 2.5 cm wide by 50 cm long,with a 0.70- $\mu$ m thick strip of paper ( $\kappa$ = 3.7) sandwiched between them.The capacitor is rolled up to save space.What is the capacitance of this device? (The permittivity of free space $\varepsilon$ ₀ = 8.85 $\times$ 10^-12 F/m.)

A) 43 nF
B) 0.16 $\mu$ F
C) 0.58 $\mu$ F
D) 2.0 $\mu$ F
E) 7.3 $\mu$ F