A parallel plate capacitor has plates with dimensions 15 cm × 15 cm and a charge of ±60 nC as depicted in the figure. A 2.5 g cube hangs freely within the capacitor and is attracted to one of the plates. Determine the charge on the cube.

• A. 1.9 × 10^-4 C
• B. 1.9 × 10^-7 C
• C. 3.0 × 10^-8 C
• D. 2.9 × 10^-9 C

Answer: (C)