N.1. A parallel plate capacitor has a potential difference between its plates of 1.6 V and a plate separation distance of 2.5 mm. What is the magnitude of the electric field if a material that has a dielectric constant of 3.4 is inserted between the plates? A) 110 V/m B) 170 V/m C) 190 V/m D) 240 V/m E) 290 V/m Ans: C

Two thin plates (0.50 m x 0.50 m x 'very thin') of a parallel capacitor are located parallel to the xzplane. One of the large plates crosses the y-axis at y = 0 cm, and the other crosses at y = -1 cm. The charge on the positive plate is +30 nC, and on the negative plate, -30 nC. a) What is the voltage from the positive plate to the negative plate? b) What is the electric potential difference from the negative plate to a point in the middle of the space between the plates? c) If the electric potential at the negative plate is 100 V, what is the electric potential at the positive plate? ( d-f) The negative plate is now shifted 0.5 cm away from the positive plate. d) What is the voltage from the positive to the negative plate? ( e-f) If an electron is released from rest from very close to the negative plate, and it flies to the positive plate, e) what is the electron's change in potential energy? f) what is the electron's speed when it hits the positive plate?

The electric potential increases from 100 V to 800 V from the bottom plate to the top plate of a parallel-plate capacitor. a. What is the magnitude of the change in potential energy of a −3 × 10^−4 C charge that is moved from the bottom plate to the top plate? b. Does the potential energy increase or decrease in this process?

Charge q is fired through a small hole in the positive plate of a capacitor, as shown.a. If q is a positive charge, does it speed up or slow down inside the capacitor? Answer this question twice: (i) Using the concept of force. (ii) Using the concept of energy.b. Repeat part a if q is a negative charge.

An air-filled parallel-plate capacitor has plates of area 2.50 cm^2 separated by 1.80 mm. The capacitor is connected to a(n) 13.0 V battery. a) Find the value of its capacitance. pF b) What is the charge on the capacitor? pC c) What is the magnitude of the uniform electric field between the plates? N/C

a. As shown, which capacitor plate, left or right, is the positive plate?b. What is the electric field strength inside the capacitor?c. What is the potential energy of a proton at the midpoint of the capacitor?