3. [2pt] A parallel-plate capacitor is constructed from two circular plates each with diameter 15.0 cm separated by 1.30 mm. What charge will collect on the plates if the capacitor is connected to a potential difference of 87.0 V? Answer: Submit All Answers| Last Answer: 1.39392e-13 C Not yet correct, tries 1/5 4. [2pt] The capacitor described in the previous problem is now disconnected from the voltage source. The separation between the capacitor plates is halved and an insulator is inserted between the plates. The voltage between the plates is then measured to be 7.9 V. Find the dielectric constant of the insulator. Answer: Submit All Answers | Last Answer: 22.0253 Incorrect, tries 1/5