AP Physics 2 Multiple-Select Practice Question 1
Which of the following would increase the capacitance of a parallel-plate capacitor? Select two answers.
Correct Answer: BC
B, C Placing a dielectric (insulator) in between the plates of a capacitor always increases the capacitance. Choice (B) will increase the capacitance. A capacitor’s capacitance is determined by the area of its plates, A, and the distance of separation, d, between the plates as given in the equation C = ε0A/d. By moving the plates closer we increase the capacitance. Choice (C) will also increase the capacitance.